Merge tag '1.5.2' into trz/rebase

61 files changed, 3770 insertions, 2117 deletions

diff --git a/src/main/java/eu/siacs/conversations/Config.java b/src/main/java/eu/siacs/conversations/Config.java
index fa9345a2..00225f7b 100644
--- a/src/main/java/eu/siacs/conversations/Config.java
+++ b/src/main/java/eu/siacs/conversations/Config.java
@@ -11,6 +11,7 @@ public final class Config {
 	public static final int PING_MAX_INTERVAL = 300;
 	public static final int PING_MIN_INTERVAL = 30;
 	public static final int PING_TIMEOUT = 10;
+	public static final int SOCKET_TIMEOUT = 15;
 	public static final int CONNECT_TIMEOUT = 90;
 	public static final int CARBON_GRACE_PERIOD = 60;
 	public static final int MINI_GRACE_PERIOD = 750;
@@ -30,6 +31,10 @@ public final class Config {
 
 	public static final boolean NO_PROXY_LOOKUP = false; //useful to debug ibb
 	public static final boolean DISABLE_STRING_PREP = false; // setting to true might increase startup performance
+	public static final boolean EXTENDED_SM_LOGGING = true; // log stanza counts
+	public static final boolean RESET_ATTEMPT_COUNT_ON_NETWORK_CHANGE = true; //setting to true might increase power consumption
+
+	public static final boolean ENCRYPT_ON_HTTP_UPLOADED = false;
 
 	public static final long MILLISECONDS_IN_DAY = 24 * 60 * 60 * 1000;
 	public static final long MAM_MAX_CATCHUP =  MILLISECONDS_IN_DAY / 2;
diff --git a/src/main/java/eu/siacs/conversations/crypto/OtrEngine.java b/src/main/java/eu/siacs/conversations/crypto/OtrService.java
index 20427d7b..c23a7fc8 100644
--- a/src/main/java/eu/siacs/conversations/crypto/OtrEngine.java
+++ b/src/main/java/eu/siacs/conversations/crypto/OtrService.java
@@ -36,14 +36,14 @@ import net.java.otr4j.session.InstanceTag;
 import net.java.otr4j.session.SessionID;
 import net.java.otr4j.session.FragmenterInstructions;
 
-public class OtrEngine extends OtrCryptoEngineImpl implements OtrEngineHost {
+public class OtrService extends OtrCryptoEngineImpl implements OtrEngineHost {
 
 	private Account account;
 	private OtrPolicy otrPolicy;
 	private KeyPair keyPair;
 	private XmppConnectionService mXmppConnectionService;
 
-	public OtrEngine(XmppConnectionService service, Account account) {
+	public OtrService(XmppConnectionService service, Account account) {
 		this.account = account;
 		this.otrPolicy = new OtrPolicyImpl();
 		this.otrPolicy.setAllowV1(false);
@@ -182,8 +182,8 @@ public class OtrEngine extends OtrCryptoEngineImpl implements OtrEngineHost {
 		packet.setBody(body);
 		packet.addChild("private", "urn:xmpp:carbons:2");
 		packet.addChild("no-copy", "urn:xmpp:hints");
-		packet.addChild("no-store", "urn:xmpp:hints");
-
+		packet.addChild("no-permanent-store", "urn:xmpp:hints");
+		packet.addChild("no-permanent-storage", "urn:xmpp:hints");
 		try {
 			Jid jid = Jid.fromSessionID(session);
 			Conversation conversation = mXmppConnectionService.find(account,jid);
@@ -202,20 +202,7 @@ public class OtrEngine extends OtrCryptoEngineImpl implements OtrEngineHost {
 
 	@Override
 	public void messageFromAnotherInstanceReceived(SessionID session) {
-		try {
-			Jid jid = Jid.fromSessionID(session);
-			Conversation conversation = mXmppConnectionService.find(account, jid);
-			String id = conversation == null ? null : conversation.getLastReceivedOtrMessageId();
-			if (id != null) {
-				MessagePacket packet = mXmppConnectionService.getMessageGenerator().generateOtrError(jid,id);
-				packet.setFrom(account.getJid());
-				mXmppConnectionService.sendMessagePacket(account,packet);
-				Log.d(Config.LOGTAG,packet.toString());
-				Log.d(Config.LOGTAG,account.getJid().toBareJid().toString()+": unreadable OTR message in "+conversation.getName());
-			}
-		} catch (InvalidJidException e) {
-			return;
-		}
+		sendOtrErrorMessage(session, "Message from another OTR-instance received");
 	}
 
 	@Override
@@ -267,9 +254,28 @@ public class OtrEngine extends OtrCryptoEngineImpl implements OtrEngineHost {
 	}
 
 	@Override
-	public void unreadableMessageReceived(SessionID arg0) throws OtrException {
+	public void unreadableMessageReceived(SessionID session) throws OtrException {
 		Log.d(Config.LOGTAG,"unreadable message received");
-		throw new OtrException(new Exception("unreadable message received"));
+		sendOtrErrorMessage(session, "You sent me an unreadable OTR-encrypted message");
+	}
+
+	public void sendOtrErrorMessage(SessionID session, String errorText) {
+		try {
+			Jid jid = Jid.fromSessionID(session);
+			Conversation conversation = mXmppConnectionService.find(account, jid);
+			String id = conversation == null ? null : conversation.getLastReceivedOtrMessageId();
+			if (id != null) {
+				MessagePacket packet = mXmppConnectionService.getMessageGenerator()
+						.generateOtrError(jid, id, errorText);
+				packet.setFrom(account.getJid());
+				mXmppConnectionService.sendMessagePacket(account,packet);
+				Log.d(Config.LOGTAG,packet.toString());
+				Log.d(Config.LOGTAG,account.getJid().toBareJid().toString()
+						+": unreadable OTR message in "+conversation.getName());
+			}
+		} catch (InvalidJidException e) {
+			return;
+		}
 	}
 
 	@Override
@@ -279,7 +285,7 @@ public class OtrEngine extends OtrCryptoEngineImpl implements OtrEngineHost {
 
 	@Override
 	public void verify(SessionID id, String fingerprint, boolean approved) {
-		Log.d(Config.LOGTAG,"OtrEngine.verify("+id.toString()+","+fingerprint+","+String.valueOf(approved)+")");
+		Log.d(Config.LOGTAG,"OtrService.verify("+id.toString()+","+fingerprint+","+String.valueOf(approved)+")");
 		try {
 			final Jid jid = Jid.fromSessionID(id);
 			Conversation conversation = this.mXmppConnectionService.find(this.account,jid);
diff --git a/src/main/java/eu/siacs/conversations/crypto/PgpEngine.java b/src/main/java/eu/siacs/conversations/crypto/PgpEngine.java
index 3dc3fd34..4a4d3f03 100644
--- a/src/main/java/eu/siacs/conversations/crypto/PgpEngine.java
+++ b/src/main/java/eu/siacs/conversations/crypto/PgpEngine.java
@@ -60,11 +60,11 @@ public class PgpEngine {
 								message.setEncryption(Message.ENCRYPTION_DECRYPTED);
 								final HttpConnectionManager manager = mXmppConnectionService.getHttpConnectionManager();
 								if (message.trusted()
+										&& message.treatAsDownloadable() != Message.Decision.NEVER
                                         && Settings.DOWNLOAD_IMAGE_LINKS
                                         && mXmppConnectionService.isDownloadAllowedInConnection()
-										&& message.bodyContainsDownloadable()
 										&& manager.getAutoAcceptFileSize() > 0) {
-									manager.createNewConnection(message);
+									manager.createNewDownloadConnection(message);
 								}
 								callback.success(message);
 							}
@@ -101,7 +101,7 @@ public class PgpEngine {
 						switch (result.getIntExtra(OpenPgpApi.RESULT_CODE,
 								OpenPgpApi.RESULT_CODE_ERROR)) {
 						case OpenPgpApi.RESULT_CODE_SUCCESS:
-							URL url = message.getImageParams().url;
+							URL url = message.getFileParams().url;
 							mXmppConnectionService.getFileBackend().updateFileParams(message,url);
 							message.setEncryption(Message.ENCRYPTION_DECRYPTED);
 							PgpEngine.this.mXmppConnectionService
@@ -146,11 +146,15 @@ public class PgpEngine {
 		params.putExtra(OpenPgpApi.EXTRA_ACCOUNT_NAME, message
 				.getConversation().getAccount().getJid().toBareJid().toString());
 
-		if (message.getType() == Message.TYPE_TEXT) {
+		if (!message.needsUploading()) {
 			params.putExtra(OpenPgpApi.EXTRA_REQUEST_ASCII_ARMOR, true);
-
-			InputStream is = new ByteArrayInputStream(message.getBody()
-					.getBytes());
+			String body;
+			if (message.hasFileOnRemoteHost()) {
+				body = message.getFileParams().url.toString();
+			} else {
+				body = message.getBody();
+			}
+			InputStream is = new ByteArrayInputStream(body.getBytes());
 			final OutputStream os = new ByteArrayOutputStream();
 			api.executeApiAsync(params, is, os, new IOpenPgpCallback() {
 
@@ -187,7 +191,7 @@ public class PgpEngine {
 					}
 				}
 			});
-		} else if (message.getType() == Message.TYPE_IMAGE || message.getType() == Message.TYPE_FILE) {
+		} else {
 			try {
 				DownloadableFile inputFile = this.mXmppConnectionService
 						.getFileBackend().getFile(message, true);
diff --git a/src/main/java/eu/siacs/conversations/crypto/sasl/ScramSha1.java b/src/main/java/eu/siacs/conversations/crypto/sasl/ScramSha1.java
index 10cd3167..c95a62df 100644
--- a/src/main/java/eu/siacs/conversations/crypto/sasl/ScramSha1.java
+++ b/src/main/java/eu/siacs/conversations/crypto/sasl/ScramSha1.java
@@ -185,7 +185,7 @@ public class ScramSha1 extends SaslMechanism {
 			case RESPONSE_SENT:
 				final String clientCalculatedServerFinalMessage = "v=" +
 					Base64.encodeToString(serverSignature, Base64.NO_WRAP);
-				if (!clientCalculatedServerFinalMessage.equals(new String(Base64.decode(challenge, Base64.DEFAULT)))) {
+				if (challenge == null || !clientCalculatedServerFinalMessage.equals(new String(Base64.decode(challenge, Base64.DEFAULT)))) {
 					throw new AuthenticationException("Server final message does not match calculated final message");
 				}
 				state = State.VALID_SERVER_RESPONSE;
diff --git a/src/main/java/eu/siacs/conversations/entities/Account.java b/src/main/java/eu/siacs/conversations/entities/Account.java
index 2bc2c954..f472361f 100644
--- a/src/main/java/eu/siacs/conversations/entities/Account.java
+++ b/src/main/java/eu/siacs/conversations/entities/Account.java
@@ -19,7 +19,7 @@ import java.util.concurrent.CopyOnWriteArraySet;
 
 import eu.siacs.conversations.Config;
 import eu.siacs.conversations.R;
-import eu.siacs.conversations.crypto.OtrEngine;
+import eu.siacs.conversations.crypto.OtrService;
 import eu.siacs.conversations.services.XmppConnectionService;
 import eu.siacs.conversations.xmpp.XmppConnection;
 import eu.siacs.conversations.xmpp.jid.InvalidJidException;
@@ -44,6 +44,10 @@ public class Account extends AbstractEntity {
 	public static final int OPTION_REGISTER = 2;
 	public static final int OPTION_USECOMPRESSION = 3;
 
+	public boolean httpUploadAvailable() {
+		return xmppConnection != null && xmppConnection.getFeatures().httpUpload();
+	}
+
 	public static enum State {
 		DISABLED,
 		OFFLINE,
@@ -117,7 +121,7 @@ public class Account extends AbstractEntity {
 	protected JSONObject keys = new JSONObject();
 	protected String avatar;
 	protected boolean online = false;
-	private OtrEngine otrEngine = null;
+	private OtrService mOtrService = null;
 	private XmppConnection xmppConnection = null;
 	private long mEndGracePeriod = 0L;
 	private String otrFingerprint;
@@ -229,11 +233,17 @@ public class Account extends AbstractEntity {
 		return jid.getResourcepart();
 	}
 
-	public void setResource(final String resource) {
-		try {
-			jid = Jid.fromParts(jid.getLocalpart(), jid.getDomainpart(), resource);
-		} catch (final InvalidJidException ignored) {
+	public boolean setResource(final String resource) {
+		final String oldResource = jid.getResourcepart();
+		if (oldResource == null || !oldResource.equals(resource)) {
+			try {
+				jid = Jid.fromParts(jid.getLocalpart(), jid.getDomainpart(), resource);
+				return true;
+			} catch (final InvalidJidException ignored) {
+				return true;
+			}
 		}
+		return false;
 	}
 
 	public Jid getJid() {
@@ -267,12 +277,12 @@ public class Account extends AbstractEntity {
 		return values;
 	}
 
-	public void initOtrEngine(final XmppConnectionService context) {
-		this.otrEngine = new OtrEngine(context, this);
+	public void initAccountServices(final XmppConnectionService context) {
+		this.mOtrService = new OtrService(context, this);
 	}
 
-	public OtrEngine getOtrEngine() {
-		return this.otrEngine;
+	public OtrService getOtrService() {
+		return this.mOtrService;
 	}
 
 	public XmppConnection getXmppConnection() {
@@ -286,10 +296,10 @@ public class Account extends AbstractEntity {
 	public String getOtrFingerprint() {
 		if (this.otrFingerprint == null) {
 			try {
-				if (this.otrEngine == null) {
+				if (this.mOtrService == null) {
 					return null;
 				}
-				final PublicKey publicKey = this.otrEngine.getPublicKey();
+				final PublicKey publicKey = this.mOtrService.getPublicKey();
 				if (publicKey == null || !(publicKey instanceof DSAPublicKey)) {
 					return null;
 				}
diff --git a/src/main/java/eu/siacs/conversations/entities/Bookmark.java b/src/main/java/eu/siacs/conversations/entities/Bookmark.java
index cc3d3424..06c46c1c 100644
--- a/src/main/java/eu/siacs/conversations/entities/Bookmark.java
+++ b/src/main/java/eu/siacs/conversations/entities/Bookmark.java
@@ -82,12 +82,7 @@ public class Bookmark extends Element implements ListItem {
 	}
 
 	public String getNick() {
-		Element nick = this.findChild("nick");
-		if (nick != null) {
-			return nick.getContent();
-		} else {
-			return null;
-		}
+		return this.findChildContent("nick");
 	}
 
 	public void setNick(String nick) {
@@ -103,12 +98,7 @@ public class Bookmark extends Element implements ListItem {
 	}
 
 	public String getPassword() {
-		Element password = this.findChild("password");
-		if (password != null) {
-			return password.getContent();
-		} else {
-			return null;
-		}
+		return this.findChildContent("password");
 	}
 
 	public void setPassword(String password) {
diff --git a/src/main/java/eu/siacs/conversations/entities/Contact.java b/src/main/java/eu/siacs/conversations/entities/Contact.java
index 26145d82..a215874f 100644
--- a/src/main/java/eu/siacs/conversations/entities/Contact.java
+++ b/src/main/java/eu/siacs/conversations/entities/Contact.java
@@ -16,6 +16,7 @@ import eu.siacs.conversations.utils.UIHelper;
 import eu.siacs.conversations.xml.Element;
 import eu.siacs.conversations.xmpp.jid.InvalidJidException;
 import eu.siacs.conversations.xmpp.jid.Jid;
+import eu.siacs.conversations.xmpp.pep.Avatar;
 
 public class Contact implements ListItem, Blockable {
 	public static final String TABLENAME = "contacts";
@@ -41,11 +42,11 @@ public class Contact implements ListItem, Blockable {
 	protected int subscription = 0;
 	protected String systemAccount;
 	protected String photoUri;
-	protected String avatar;
 	protected JSONObject keys = new JSONObject();
 	protected JSONArray groups = new JSONArray();
 	protected Presences presences = new Presences();
 	protected Account account;
+	protected Avatar avatar;
 
 	public Contact(final String account, final String systemName, final String serverName,
 			final Jid jid, final int subscription, final String photoUri,
@@ -62,7 +63,11 @@ public class Contact implements ListItem, Blockable {
 		} catch (JSONException e) {
 			this.keys = new JSONObject();
 		}
-		this.avatar = avatar;
+		if (avatar != null) {
+			this.avatar = new Avatar();
+			this.avatar.sha1sum = avatar;
+			this.avatar.origin = Avatar.Origin.VCARD; //always assume worst
+		}
 		try {
 			this.groups = (groups == null ? new JSONArray() : new JSONArray(groups));
 		} catch (JSONException e) {
@@ -136,10 +141,10 @@ public class Contact implements ListItem, Blockable {
 				tags.add(new Tag("away", 0xffff9800));
 				break;
 			case Presences.XA:
-				tags.add(new Tag("not available", 0xffe51c23));
+				tags.add(new Tag("not available", 0xfff44336));
 				break;
 			case Presences.DND:
-				tags.add(new Tag("dnd", 0xffe51c23));
+				tags.add(new Tag("dnd", 0xfff44336));
 				break;
 		}
 		if (isBlocked()) {
@@ -193,7 +198,7 @@ public class Contact implements ListItem, Blockable {
 		values.put(SYSTEMACCOUNT, systemAccount);
 		values.put(PHOTOURI, photoUri);
 		values.put(KEYS, keys.toString());
-		values.put(AVATAR, avatar);
+		values.put(AVATAR, avatar == null ? null : avatar.getFilename());
 		values.put(LAST_PRESENCE, lastseen.presence);
 		values.put(LAST_TIME, lastseen.time);
 		values.put(GROUPS, groups.toString());
@@ -238,8 +243,16 @@ public class Contact implements ListItem, Blockable {
 		return this.presences.getMostAvailableStatus();
 	}
 
-	public void setPhotoUri(String uri) {
-		this.photoUri = uri;
+	public boolean setPhotoUri(String uri) {
+		if (uri != null && !uri.equals(this.photoUri)) {
+			this.photoUri = uri;
+			return true;
+		} else if (this.photoUri != null && uri == null) {
+			this.photoUri = null;
+			return true;
+		} else {
+			return false;
+		}
 	}
 
 	public void setServerName(String serverName) {
@@ -417,17 +430,20 @@ public class Contact implements ListItem, Blockable {
 		return getJid().toDomainJid();
 	}
 
-	public boolean setAvatar(String filename) {
-		if (this.avatar != null && this.avatar.equals(filename)) {
+	public boolean setAvatar(Avatar avatar) {
+		if (this.avatar != null && this.avatar.equals(avatar)) {
 			return false;
 		} else {
-			this.avatar = filename;
+			if (this.avatar != null && this.avatar.origin == Avatar.Origin.PEP && avatar.origin == Avatar.Origin.VCARD) {
+				return false;
+			}
+			this.avatar = avatar;
 			return true;
 		}
 	}
 
 	public String getAvatar() {
-		return this.avatar;
+		return avatar == null ? null : avatar.getFilename();
 	}
 
 	public boolean deleteOtrFingerprint(String fingerprint) {
@@ -484,6 +500,10 @@ public class Contact implements ListItem, Blockable {
 		}
 	}
 
+	public boolean isSelf() {
+		return account.getJid().toBareJid().equals(getJid().toBareJid());
+	}
+
 	public static class Lastseen {
 		public long time;
 		public String presence;
diff --git a/src/main/java/eu/siacs/conversations/entities/Conversation.java b/src/main/java/eu/siacs/conversations/entities/Conversation.java
index bfee5007..289ed4ea 100644
--- a/src/main/java/eu/siacs/conversations/entities/Conversation.java
+++ b/src/main/java/eu/siacs/conversations/entities/Conversation.java
@@ -16,6 +16,7 @@ import java.security.interfaces.DSAPublicKey;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.Comparator;
+import java.util.Iterator;
 import java.util.List;
 
 import eu.siacs.conversations.Config;
@@ -218,6 +219,11 @@ public class Conversation extends AbstractEntity implements Blockable {
 			messages.clear();
 			messages.addAll(this.messages);
 		}
+		for(Iterator<Message> iterator = messages.iterator(); iterator.hasNext();) {
+			if (iterator.next().wasMergedIntoPrevious()) {
+				iterator.remove();
+			}
+		}
 	}
 
 	@Override
@@ -243,6 +249,12 @@ public class Conversation extends AbstractEntity implements Blockable {
 		this.mLastReceivedOtrMessageId = id;
 	}
 
+	public int countMessages() {
+		synchronized (this.messages) {
+			return this.messages.size();
+		}
+	}
+
 
 	public interface OnMessageFound {
 		public void onMessageFound(final Message message);
@@ -413,7 +425,7 @@ public class Conversation extends AbstractEntity implements Blockable {
 			final SessionID sessionId = new SessionID(this.getJid().toBareJid().toString(),
 					presence,
 					"xmpp");
-			this.otrSession = new SessionImpl(sessionId, getAccount().getOtrEngine());
+			this.otrSession = new SessionImpl(sessionId, getAccount().getOtrService());
 			try {
 				if (sendStart) {
 					this.otrSession.startSession();
@@ -485,7 +497,7 @@ public class Conversation extends AbstractEntity implements Blockable {
 					return null;
 				}
 				DSAPublicKey remotePubKey = (DSAPublicKey) getOtrSession().getRemotePublicKey();
-				this.otrFingerprint = getAccount().getOtrEngine().getFingerprint(remotePubKey);
+				this.otrFingerprint = getAccount().getOtrService().getFingerprint(remotePubKey);
 			} catch (final OtrCryptoException | UnsupportedOperationException ignored) {
 				return null;
 			}
diff --git a/src/main/java/eu/siacs/conversations/entities/Downloadable.java b/src/main/java/eu/siacs/conversations/entities/Downloadable.java
deleted file mode 100644
index d25bf93a..00000000
--- a/src/main/java/eu/siacs/conversations/entities/Downloadable.java
+++ /dev/null
@@ -1,28 +0,0 @@
-package eu.siacs.conversations.entities;
-
-public interface Downloadable {
-
-	public final String[] VALID_IMAGE_EXTENSIONS = {"webp", "jpeg", "jpg", "png", "jpe"};
-	public final String[] VALID_CRYPTO_EXTENSIONS = {"pgp", "gpg", "otr"};
-
-	public static final int STATUS_UNKNOWN = 0x200;
-	public static final int STATUS_CHECKING = 0x201;
-	public static final int STATUS_FAILED = 0x202;
-	public static final int STATUS_OFFER = 0x203;
-	public static final int STATUS_DOWNLOADING = 0x204;
-	public static final int STATUS_DELETED = 0x205;
-	public static final int STATUS_OFFER_CHECK_FILESIZE = 0x206;
-	public static final int STATUS_UPLOADING = 0x207;
-
-	public boolean start();
-
-	public int getStatus();
-
-	public long getFileSize();
-
-	public int getProgress();
-
-	public String getMimeType();
-
-	public void cancel();
-}
diff --git a/src/main/java/eu/siacs/conversations/entities/DownloadableFile.java b/src/main/java/eu/siacs/conversations/entities/DownloadableFile.java
index 7c8f95d1..ae9ba1f1 100644
--- a/src/main/java/eu/siacs/conversations/entities/DownloadableFile.java
+++ b/src/main/java/eu/siacs/conversations/entities/DownloadableFile.java
@@ -20,6 +20,8 @@ import javax.crypto.spec.IvParameterSpec;
 import javax.crypto.spec.SecretKeySpec;
 
 import eu.siacs.conversations.Config;
+import eu.siacs.conversations.utils.MimeUtils;
+
 import android.util.Log;
 
 public class DownloadableFile extends File {
@@ -56,16 +58,11 @@ public class DownloadableFile extends File {
 
 	public String getMimeType() {
 		String path = this.getAbsolutePath();
-		try {
-			String mime = URLConnection.guessContentTypeFromName(path.replace("#",""));
-			if (mime != null) {
-				return mime;
-			} else if (mime == null && path.endsWith(".webp")) {
-				return "image/webp";
-			} else {
-				return "";
-			}
-		} catch (final StringIndexOutOfBoundsException e) {
+		int start = path.lastIndexOf('.') + 1;
+		if (start < path.length()) {
+			String mime = MimeUtils.guessMimeTypeFromExtension(path.substring(start));
+			return mime == null ? "" : mime;
+		} else {
 			return "";
 		}
 	}
diff --git a/src/main/java/eu/siacs/conversations/entities/Message.java b/src/main/java/eu/siacs/conversations/entities/Message.java
index bcb1ca24..9a904cab 100644
--- a/src/main/java/eu/siacs/conversations/entities/Message.java
+++ b/src/main/java/eu/siacs/conversations/entities/Message.java
@@ -9,6 +9,8 @@ import java.util.Arrays;
 
 import eu.siacs.conversations.Config;
 import eu.siacs.conversations.utils.GeoHelper;
+import eu.siacs.conversations.utils.MimeUtils;
+import eu.siacs.conversations.utils.UIHelper;
 import eu.siacs.conversations.xmpp.jid.InvalidJidException;
 import eu.siacs.conversations.xmpp.jid.Jid;
 
@@ -16,6 +18,8 @@ public class Message extends AbstractEntity {
 
 	public static final String TABLENAME = "messages";
 
+	public static final String MERGE_SEPARATOR = " \u200B\n\n";
+
 	public static final int STATUS_RECEIVED = 0;
 	public static final int STATUS_UNSEND = 1;
 	public static final int STATUS_SEND = 2;
@@ -66,7 +70,7 @@ public class Message extends AbstractEntity {
 	protected String remoteMsgId = null;
 	protected String serverMsgId = null;
 	protected Conversation conversation = null;
-	protected Downloadable downloadable = null;
+	protected Transferable transferable = null;
 	private Message mNextMessage = null;
 	private Message mPreviousMessage = null;
 
@@ -95,9 +99,9 @@ public class Message extends AbstractEntity {
 	}
 
 	private Message(final String uuid, final String conversationUUid, final Jid counterpart,
-			final Jid trueCounterpart, final String body, final long timeSent,
-			final int encryption, final int status, final int type, final String remoteMsgId,
-			final String relativeFilePath, final String serverMsgId) {
+					final Jid trueCounterpart, final String body, final long timeSent,
+					final int encryption, final int status, final int type, final String remoteMsgId,
+					final String relativeFilePath, final String serverMsgId) {
 		this.uuid = uuid;
 		this.conversationUuid = conversationUUid;
 		this.counterpart = counterpart;
@@ -179,7 +183,7 @@ public class Message extends AbstractEntity {
 		values.put(TYPE, type);
 		values.put(REMOTE_MSG_ID, remoteMsgId);
 		values.put(RELATIVE_FILE_PATH, relativeFilePath);
-		values.put(SERVER_MSG_ID,serverMsgId);
+		values.put(SERVER_MSG_ID, serverMsgId);
 		return values;
 	}
 
@@ -211,7 +215,7 @@ public class Message extends AbstractEntity {
 				return null;
 			} else {
 				return this.conversation.getAccount().getRoster()
-					.getContactFromRoster(this.trueCounterpart);
+						.getContactFromRoster(this.trueCounterpart);
 			}
 		}
 	}
@@ -304,12 +308,12 @@ public class Message extends AbstractEntity {
 		this.trueCounterpart = trueCounterpart;
 	}
 
-	public Downloadable getDownloadable() {
-		return this.downloadable;
+	public Transferable getTransferable() {
+		return this.transferable;
 	}
 
-	public void setDownloadable(Downloadable downloadable) {
-		this.downloadable = downloadable;
+	public void setTransferable(Transferable transferable) {
+		this.transferable = transferable;
 	}
 
 	public boolean equals(Message message) {
@@ -317,15 +321,25 @@ public class Message extends AbstractEntity {
 			return this.serverMsgId.equals(message.getServerMsgId());
 		} else if (this.body == null || this.counterpart == null) {
 			return false;
-		} else if (message.getRemoteMsgId() != null) {
-			return (message.getRemoteMsgId().equals(this.remoteMsgId) || message.getRemoteMsgId().equals(this.uuid))
-					&& this.counterpart.equals(message.getCounterpart())
-					&& this.body.equals(message.getBody());
 		} else {
-			return this.remoteMsgId == null
-					&& this.counterpart.equals(message.getCounterpart())
-					&& this.body.equals(message.getBody())
-					&& Math.abs(this.getTimeSent() - message.getTimeSent()) < Config.PING_TIMEOUT * 500;
+			String body, otherBody;
+			if (this.hasFileOnRemoteHost()) {
+				body = getFileParams().url.toString();
+				otherBody = message.body == null ? null : message.body.trim();
+			} else {
+				body = this.body;
+				otherBody = message.body;
+			}
+			if (message.getRemoteMsgId() != null) {
+				return (message.getRemoteMsgId().equals(this.remoteMsgId) || message.getRemoteMsgId().equals(this.uuid))
+						&& this.counterpart.equals(message.getCounterpart())
+						&& body.equals(otherBody);
+			} else {
+				return this.remoteMsgId == null
+						&& this.counterpart.equals(message.getCounterpart())
+						&& body.equals(otherBody)
+						&& Math.abs(this.getTimeSent() - message.getTimeSent()) < Config.MESSAGE_MERGE_WINDOW * 1000;
+			}
 		}
 	}
 
@@ -359,41 +373,43 @@ public class Message extends AbstractEntity {
 
 	public boolean mergeable(final Message message) {
 		return message != null &&
-			(message.getType() == Message.TYPE_TEXT &&
-			 this.getDownloadable() == null &&
-			 message.getDownloadable() == null &&
-			 message.getEncryption() != Message.ENCRYPTION_PGP &&
-			 this.getType() == message.getType() &&
-			 //this.getStatus() == message.getStatus() &&
-			 isStatusMergeable(this.getStatus(),message.getStatus()) &&
-			 this.getEncryption() == message.getEncryption() &&
-			 this.getCounterpart() != null &&
-			 this.getCounterpart().equals(message.getCounterpart()) &&
-			 (message.getTimeSent() - this.getTimeSent()) <= (Config.MESSAGE_MERGE_WINDOW * 1000) &&
-			 !GeoHelper.isGeoUri(message.getBody()) &&
-			 !GeoHelper.isGeoUri(this.body) &&
-			 !message.bodyContainsDownloadable() &&
-			 !this.bodyContainsDownloadable() &&
-			 !message.getBody().startsWith(ME_COMMAND) &&
-			 !this.getBody().startsWith(ME_COMMAND)
-			);
+				(message.getType() == Message.TYPE_TEXT &&
+						this.getTransferable() == null &&
+						message.getTransferable() == null &&
+						message.getEncryption() != Message.ENCRYPTION_PGP &&
+						this.getType() == message.getType() &&
+						//this.getStatus() == message.getStatus() &&
+						isStatusMergeable(this.getStatus(), message.getStatus()) &&
+						this.getEncryption() == message.getEncryption() &&
+						this.getCounterpart() != null &&
+						this.getCounterpart().equals(message.getCounterpart()) &&
+						(message.getTimeSent() - this.getTimeSent()) <= (Config.MESSAGE_MERGE_WINDOW * 1000) &&
+						!GeoHelper.isGeoUri(message.getBody()) &&
+						!GeoHelper.isGeoUri(this.body) &&
+						message.treatAsDownloadable() == Decision.NEVER &&
+						this.treatAsDownloadable() == Decision.NEVER &&
+						!message.getBody().startsWith(ME_COMMAND) &&
+						!this.getBody().startsWith(ME_COMMAND) &&
+						!this.bodyIsHeart() &&
+						!message.bodyIsHeart()
+				);
 	}
 
 	private static boolean isStatusMergeable(int a, int b) {
 		return a == b || (
-				( a == Message.STATUS_SEND_RECEIVED && b == Message.STATUS_UNSEND)
-				|| (a == Message.STATUS_SEND_RECEIVED && b == Message.STATUS_SEND)
-				|| (a == Message.STATUS_UNSEND && b == Message.STATUS_SEND)
-				|| (a == Message.STATUS_UNSEND && b == Message.STATUS_SEND_RECEIVED)
-				|| (a == Message.STATUS_SEND && b == Message.STATUS_UNSEND)
-				|| (a == Message.STATUS_SEND && b == Message.STATUS_SEND_RECEIVED)
+				(a == Message.STATUS_SEND_RECEIVED && b == Message.STATUS_UNSEND)
+						|| (a == Message.STATUS_SEND_RECEIVED && b == Message.STATUS_SEND)
+						|| (a == Message.STATUS_UNSEND && b == Message.STATUS_SEND)
+						|| (a == Message.STATUS_UNSEND && b == Message.STATUS_SEND_RECEIVED)
+						|| (a == Message.STATUS_SEND && b == Message.STATUS_UNSEND)
+						|| (a == Message.STATUS_SEND && b == Message.STATUS_SEND_RECEIVED)
 		);
 	}
 
 	public String getMergedBody() {
 		final Message next = this.next();
 		if (this.mergeable(next)) {
-			return getBody() + '\n' + next.getMergedBody();
+			return getBody() + MERGE_SEPARATOR + next.getMergedBody();
 		}
 		return getBody();
 	}
@@ -429,119 +445,175 @@ public class Message extends AbstractEntity {
 		return (status > STATUS_RECEIVED || (contact != null && contact.trusted()));
 	}
 
-	public boolean bodyContainsDownloadable() {
-        /**
-         * there are a few cases where spaces result in an unwanted behavior, e.g.
-         * "http://upload.mitsu-freunde-bw.de/uploads/2015/03/i43b4bpr8.png /abc.png"
-         * or more than one image link in one message.
-         */
-        if (body.contains(" ")) {
-            return false;
-        }
-		try {
-			URL url = new URL(body);
-			if (!url.getProtocol().equalsIgnoreCase("http")
-					&& !url.getProtocol().equalsIgnoreCase("https")) {
-				return false;
-					}
-
-            String sUrlPath = url.getPath();
-			if (sUrlPath == null || sUrlPath.isEmpty()) {
+	public boolean fixCounterpart() {
+		Presences presences = conversation.getContact().getPresences();
+		if (counterpart != null && presences.has(counterpart.getResourcepart())) {
+			return true;
+		} else if (presences.size() >= 1) {
+			try {
+				counterpart = Jid.fromParts(conversation.getJid().getLocalpart(),
+						conversation.getJid().getDomainpart(),
+						presences.asStringArray()[0]);
+				return true;
+			} catch (InvalidJidException e) {
+				counterpart = null;
 				return false;
 			}
+		} else {
+			counterpart = null;
+			return false;
+		}
+	}
 
-            int iSlashIndex = sUrlPath.lastIndexOf('/') + 1;
+	public enum Decision {
+		MUST,
+		SHOULD,
+		NEVER,
+	}
 
-            String sLastUrlPath = sUrlPath.substring(iSlashIndex).toLowerCase();
+	private static String extractRelevantExtension(URL url) {
+		String path = url.getPath();
+		if (path == null || path.isEmpty()) {
+			return null;
+		}
+		String filename = path.substring(path.lastIndexOf('/') + 1).toLowerCase();
+		String[] extensionParts = filename.split("\\.");
+		if (extensionParts.length == 2) {
+			return extensionParts[extensionParts.length - 1];
+		} else if (extensionParts.length == 3 && Arrays
+				.asList(Transferable.VALID_CRYPTO_EXTENSIONS)
+				.contains(extensionParts[extensionParts.length - 1])) {
+			return extensionParts[extensionParts.length -2];
+		}
+		return null;
+	}
 
-			String[] extensionParts = sLastUrlPath.split("\\.");
-			if (extensionParts.length == 2
-					&& Arrays.asList(Downloadable.VALID_IMAGE_EXTENSIONS).contains(
-						extensionParts[extensionParts.length - 1])) {
-				return true;
-			} else if (extensionParts.length == 3
-					&& Arrays
-					.asList(Downloadable.VALID_CRYPTO_EXTENSIONS)
-					.contains(extensionParts[extensionParts.length - 1])
-					&& Arrays.asList(Downloadable.VALID_IMAGE_EXTENSIONS).contains(
-						extensionParts[extensionParts.length - 2])) {
-				return true;
+	public String getMimeType() {
+		if (relativeFilePath != null) {
+			int start = relativeFilePath.lastIndexOf('.') + 1;
+			if (start < relativeFilePath.length()) {
+				return MimeUtils.guessMimeTypeFromExtension(relativeFilePath.substring(start));
 			} else {
-				return false;
+				return null;
+			}
+		} else {
+			try {
+				return MimeUtils.guessMimeTypeFromExtension(extractRelevantExtension(new URL(body.trim())));
+			} catch (MalformedURLException e) {
+				return null;
 			}
+		}
+	}
+
+	public Decision treatAsDownloadable() {
+		if (body.trim().contains(" ")) {
+			return Decision.NEVER;
+		}
+		try {
+			URL url = new URL(body);
+			if (!url.getProtocol().equalsIgnoreCase("http") && !url.getProtocol().equalsIgnoreCase("https")) {
+				return Decision.NEVER;
+			}
+			String extension = extractRelevantExtension(url);
+			if (extension == null) {
+				return Decision.NEVER;
+			}
+			String ref = url.getRef();
+			boolean encrypted = ref != null && ref.matches("([A-Fa-f0-9]{2}){48}");
+
+			if (encrypted) {
+				if (MimeUtils.guessMimeTypeFromExtension(extension) != null) {
+					return Decision.MUST;
+				} else {
+					return Decision.NEVER;
+				}
+			} else if (Arrays.asList(Transferable.VALID_IMAGE_EXTENSIONS).contains(extension)
+					|| Arrays.asList(Transferable.WELL_KNOWN_EXTENSIONS).contains(extension)) {
+				return Decision.SHOULD;
+			} else {
+				return Decision.NEVER;
+			}
+
 		} catch (MalformedURLException e) {
-			return false;
+			return Decision.NEVER;
 		}
 	}
 
-	public ImageParams getImageParams() {
-		ImageParams params = getLegacyImageParams();
+	public boolean bodyIsHeart() {
+		return body != null && UIHelper.HEARTS.contains(body.trim());
+	}
+
+	public FileParams getFileParams() {
+		FileParams params = getLegacyFileParams();
 		if (params != null) {
 			return params;
 		}
-		params = new ImageParams();
-		if (this.downloadable != null) {
-			params.size = this.downloadable.getFileSize();
+		params = new FileParams();
+		if (this.transferable != null) {
+			params.size = this.transferable.getFileSize();
 		}
 		if (body == null) {
 			return params;
 		}
 		String parts[] = body.split("\\|");
-		if (parts.length == 1) {
-			try {
-				params.size = Long.parseLong(parts[0]);
-			} catch (NumberFormatException e) {
-				params.origin = parts[0];
+		switch (parts.length) {
+			case 1:
+				try {
+					params.size = Long.parseLong(parts[0]);
+				} catch (NumberFormatException e) {
+					try {
+						params.url = new URL(parts[0]);
+					} catch (MalformedURLException e1) {
+						params.url = null;
+					}
+				}
+				break;
+			case 2:
+			case 4:
 				try {
 					params.url = new URL(parts[0]);
 				} catch (MalformedURLException e1) {
 					params.url = null;
 				}
-			}
-		} else if (parts.length == 3) {
-			try {
-				params.size = Long.parseLong(parts[0]);
-			} catch (NumberFormatException e) {
-				params.size = 0;
-			}
-			try {
-				params.width = Integer.parseInt(parts[1]);
-			} catch (NumberFormatException e) {
-				params.width = 0;
-			}
-			try {
-				params.height = Integer.parseInt(parts[2]);
-			} catch (NumberFormatException e) {
-				params.height = 0;
-			}
-		} else if (parts.length == 4) {
-			params.origin = parts[0];
-			try {
-				params.url = new URL(parts[0]);
-			} catch (MalformedURLException e1) {
-				params.url = null;
-			}
-			try {
-				params.size = Long.parseLong(parts[1]);
-			} catch (NumberFormatException e) {
-				params.size = 0;
-			}
-			try {
-				params.width = Integer.parseInt(parts[2]);
-			} catch (NumberFormatException e) {
-				params.width = 0;
-			}
-			try {
-				params.height = Integer.parseInt(parts[3]);
-			} catch (NumberFormatException e) {
-				params.height = 0;
-			}
+				try {
+					params.size = Long.parseLong(parts[1]);
+				} catch (NumberFormatException e) {
+					params.size = 0;
+				}
+				try {
+					params.width = Integer.parseInt(parts[2]);
+				} catch (NumberFormatException | ArrayIndexOutOfBoundsException e) {
+					params.width = 0;
+				}
+				try {
+					params.height = Integer.parseInt(parts[3]);
+				} catch (NumberFormatException | ArrayIndexOutOfBoundsException e) {
+					params.height = 0;
+				}
+				break;
+			case 3:
+				try {
+					params.size = Long.parseLong(parts[0]);
+				} catch (NumberFormatException e) {
+					params.size = 0;
+				}
+				try {
+					params.width = Integer.parseInt(parts[1]);
+				} catch (NumberFormatException e) {
+					params.width = 0;
+				}
+				try {
+					params.height = Integer.parseInt(parts[2]);
+				} catch (NumberFormatException e) {
+					params.height = 0;
+				}
+				break;
 		}
 		return params;
 	}
 
-	public ImageParams getLegacyImageParams() {
-		ImageParams params = new ImageParams();
+	public FileParams getLegacyFileParams() {
+		FileParams params = new FileParams();
 		if (body == null) {
 			return params;
 		}
@@ -577,11 +649,18 @@ public class Message extends AbstractEntity {
 		return type == TYPE_FILE || type == TYPE_IMAGE;
 	}
 
-	public class ImageParams {
+	public boolean hasFileOnRemoteHost() {
+		return isFileOrImage() && getFileParams().url != null;
+	}
+
+	public boolean needsUploading() {
+		return isFileOrImage() && getFileParams().url == null;
+	}
+
+	public class FileParams {
 		public URL url;
 		public long size = 0;
 		public int width = 0;
 		public int height = 0;
-		public String origin;
 	}
 }
diff --git a/src/main/java/eu/siacs/conversations/entities/MucOptions.java b/src/main/java/eu/siacs/conversations/entities/MucOptions.java
index addee8db..d867a370 100644
--- a/src/main/java/eu/siacs/conversations/entities/MucOptions.java
+++ b/src/main/java/eu/siacs/conversations/entities/MucOptions.java
@@ -343,8 +343,6 @@ public class MucOptions {
 					setError(ERROR_BANNED);
 				} else if (error != null && error.hasChild("registration-required")) {
 					setError(ERROR_MEMBERS_ONLY);
-				} else {
-					setError(ERROR_UNKNOWN);
 				}
 			}
 		}
diff --git a/src/main/java/eu/siacs/conversations/entities/Roster.java b/src/main/java/eu/siacs/conversations/entities/Roster.java
index ce058004..628a31d1 100644
--- a/src/main/java/eu/siacs/conversations/entities/Roster.java
+++ b/src/main/java/eu/siacs/conversations/entities/Roster.java
@@ -2,6 +2,7 @@ package eu.siacs.conversations.entities;
 
 import java.util.ArrayList;
 import java.util.HashMap;
+import java.util.Iterator;
 import java.util.List;
 
 import eu.siacs.conversations.xmpp.jid.Jid;
@@ -55,12 +56,15 @@ public class Roster {
 		}
 	}
 
-	public void clearSystemAccounts() {
-		for (Contact contact : getContacts()) {
-			contact.setPhotoUri(null);
-			contact.setSystemName(null);
-			contact.setSystemAccount(null);
+	public List<Contact> getWithSystemAccounts() {
+		List<Contact> with = getContacts();
+		for(Iterator<Contact> iterator = with.iterator(); iterator.hasNext();) {
+			Contact contact = iterator.next();
+			if (contact.getSystemAccount() == null) {
+				iterator.remove();
+			}
 		}
+		return with;
 	}
 
 	public List<Contact> getContacts() {
@@ -70,6 +74,9 @@ public class Roster {
 	}
 
 	public void initContact(final Contact contact) {
+		if (contact == null) {
+			return;
+		}
 		contact.setAccount(account);
 		contact.setOption(Contact.Options.IN_ROSTER);
 		synchronized (this.contacts) {
diff --git a/src/main/java/eu/siacs/conversations/entities/Transferable.java b/src/main/java/eu/siacs/conversations/entities/Transferable.java
new file mode 100644
index 00000000..2db6e3c9
--- /dev/null
+++ b/src/main/java/eu/siacs/conversations/entities/Transferable.java
@@ -0,0 +1,28 @@
+package eu.siacs.conversations.entities;
+
+public interface Transferable {
+
+	String[] VALID_IMAGE_EXTENSIONS = {"webp", "jpeg", "jpg", "png", "jpe"};
+	String[] VALID_CRYPTO_EXTENSIONS = {"pgp", "gpg", "otr"};
+	String[] WELL_KNOWN_EXTENSIONS = {"pdf","m4a"};
+
+	int STATUS_UNKNOWN = 0x200;
+	int STATUS_CHECKING = 0x201;
+	int STATUS_FAILED = 0x202;
+	int STATUS_OFFER = 0x203;
+	int STATUS_DOWNLOADING = 0x204;
+	int STATUS_DELETED = 0x205;
+	int STATUS_OFFER_CHECK_FILESIZE = 0x206;
+	int STATUS_UPLOADING = 0x207;
+
+
+	boolean start();
+
+	int getStatus();
+
+	long getFileSize();
+
+	int getProgress();
+
+	void cancel();
+}
diff --git a/src/main/java/eu/siacs/conversations/entities/DownloadablePlaceholder.java b/src/main/java/eu/siacs/conversations/entities/TransferablePlaceholder.java
index 03fceceb..e065953e 100644
--- a/src/main/java/eu/siacs/conversations/entities/DownloadablePlaceholder.java
+++ b/src/main/java/eu/siacs/conversations/entities/TransferablePlaceholder.java
@@ -1,10 +1,10 @@
 package eu.siacs.conversations.entities;
 
-public class DownloadablePlaceholder implements Downloadable {
+public class TransferablePlaceholder implements Transferable {
 
 	private int status;
 
-	public DownloadablePlaceholder(int status) {
+	public TransferablePlaceholder(int status) {
 		this.status = status;
 	}
 	@Override
@@ -28,11 +28,6 @@ public class DownloadablePlaceholder implements Downloadable {
 	}
 
 	@Override
-	public String getMimeType() {
-		return "";
-	}
-
-	@Override
 	public void cancel() {
 
 	}
diff --git a/src/main/java/eu/siacs/conversations/generator/IqGenerator.java b/src/main/java/eu/siacs/conversations/generator/IqGenerator.java
index 6bc629b5..47915e3f 100644
--- a/src/main/java/eu/siacs/conversations/generator/IqGenerator.java
+++ b/src/main/java/eu/siacs/conversations/generator/IqGenerator.java
@@ -6,6 +6,7 @@ import java.util.List;
 
 import eu.siacs.conversations.entities.Account;
 import eu.siacs.conversations.entities.Conversation;
+import eu.siacs.conversations.entities.DownloadableFile;
 import eu.siacs.conversations.services.MessageArchiveService;
 import eu.siacs.conversations.services.XmppConnectionService;
 import eu.siacs.conversations.utils.PhoneHelper;
@@ -91,7 +92,7 @@ public class IqGenerator extends AbstractGenerator {
 		return publish("urn:xmpp:avatar:metadata", item);
 	}
 
-	public IqPacket retrieveAvatar(final Avatar avatar) {
+	public IqPacket retrievePepAvatar(final Avatar avatar) {
 		final Element item = new Element("item");
 		item.setAttribute("id", avatar.sha1sum);
 		final IqPacket packet = retrieve("urn:xmpp:avatar:data", item);
@@ -99,6 +100,13 @@ public class IqGenerator extends AbstractGenerator {
 		return packet;
 	}
 
+	public IqPacket retrieveVcardAvatar(final Avatar avatar) {
+		final IqPacket packet = new IqPacket(IqPacket.TYPE.GET);
+		packet.setTo(avatar.owner);
+		packet.addChild("vCard", "vcard-temp");
+		return packet;
+	}
+
 	public IqPacket retrieveAvatarMetaData(final Jid to) {
 		final IqPacket packet = retrieve("urn:xmpp:avatar:metadata", null);
 		if (to != null) {
@@ -187,4 +195,13 @@ public class IqGenerator extends AbstractGenerator {
 		item.setAttribute("role", role);
 		return packet;
 	}
+
+	public IqPacket requestHttpUploadSlot(Jid host, DownloadableFile file) {
+		IqPacket packet = new IqPacket(IqPacket.TYPE.GET);
+		packet.setTo(host);
+		Element request = packet.addChild("request",Xmlns.HTTP_UPLOAD);
+		request.addChild("filename").setContent(file.getName());
+		request.addChild("size").setContent(String.valueOf(file.getExpectedSize()));
+		return packet;
+	}
 }
diff --git a/src/main/java/eu/siacs/conversations/generator/MessageGenerator.java b/src/main/java/eu/siacs/conversations/generator/MessageGenerator.java
index 8f6a90b9..e698c151 100644
--- a/src/main/java/eu/siacs/conversations/generator/MessageGenerator.java
+++ b/src/main/java/eu/siacs/conversations/generator/MessageGenerator.java
@@ -71,8 +71,16 @@ public class MessageGenerator extends AbstractGenerator {
 		MessagePacket packet = preparePacket(message, addDelay);
 		packet.addChild("private", "urn:xmpp:carbons:2");
 		packet.addChild("no-copy", "urn:xmpp:hints");
+		packet.addChild("no-permanent-store", "urn:xmpp:hints");
+		packet.addChild("no-permanent-storage", "urn:xmpp:hints");
 		try {
-			packet.setBody(otrSession.transformSending(message.getBody())[0]);
+			String content;
+			if (message.hasFileOnRemoteHost()) {
+				content = message.getFileParams().url.toString();
+			} else {
+				content = message.getBody();
+			}
+			packet.setBody(otrSession.transformSending(content)[0]);
 			return packet;
 		} catch (OtrException e) {
 			return null;
@@ -85,7 +93,11 @@ public class MessageGenerator extends AbstractGenerator {
 
 	public MessagePacket generateChat(Message message, boolean addDelay) {
 		MessagePacket packet = preparePacket(message, addDelay);
-		packet.setBody(message.getBody());
+		if (message.hasFileOnRemoteHost()) {
+			packet.setBody(message.getFileParams().url.toString());
+		} else {
+			packet.setBody(message.getBody());
+		}
 		return packet;
 	}
 
@@ -95,13 +107,11 @@ public class MessageGenerator extends AbstractGenerator {
 
 	public MessagePacket generatePgpChat(Message message, boolean addDelay) {
 		MessagePacket packet = preparePacket(message, addDelay);
-		packet.setBody("This is an XEP-0027 encryted message");
+		packet.setBody("This is an XEP-0027 encrypted message");
 		if (message.getEncryption() == Message.ENCRYPTION_DECRYPTED) {
-			packet.addChild("x", "jabber:x:encrypted").setContent(
-					message.getEncryptedBody());
+			packet.addChild("x", "jabber:x:encrypted").setContent(message.getEncryptedBody());
 		} else if (message.getEncryption() == Message.ENCRYPTION_PGP) {
-			packet.addChild("x", "jabber:x:encrypted").setContent(
-					message.getBody());
+			packet.addChild("x", "jabber:x:encrypted").setContent(message.getBody());
 		}
 		return packet;
 	}
@@ -172,7 +182,7 @@ public class MessageGenerator extends AbstractGenerator {
 		return receivedPacket;
 	}
 
-	public MessagePacket generateOtrError(Jid to, String id) {
+	public MessagePacket generateOtrError(Jid to, String id, String errorText) {
 		MessagePacket packet = new MessagePacket();
 		packet.setType(MessagePacket.TYPE_ERROR);
 		packet.setAttribute("id",id);
@@ -181,7 +191,7 @@ public class MessageGenerator extends AbstractGenerator {
 		error.setAttribute("code","406");
 		error.setAttribute("type","modify");
 		error.addChild("not-acceptable","urn:ietf:params:xml:ns:xmpp-stanzas");
-		error.addChild("text").setContent("unreadable OTR message received");
+		error.addChild("text").setContent("?OTR Error:" + errorText);
 		return packet;
 	}
 }
diff --git a/src/main/java/eu/siacs/conversations/generator/PresenceGenerator.java b/src/main/java/eu/siacs/conversations/generator/PresenceGenerator.java
index 1e896724..c40c6d05 100644
--- a/src/main/java/eu/siacs/conversations/generator/PresenceGenerator.java
+++ b/src/main/java/eu/siacs/conversations/generator/PresenceGenerator.java
@@ -49,9 +49,16 @@ public class PresenceGenerator extends AbstractGenerator {
 			Element cap = packet.addChild("c",
 					"http://jabber.org/protocol/caps");
 			cap.setAttribute("hash", "sha-1");
-			cap.setAttribute("node", "http://conversions.im");
+			cap.setAttribute("node", "http://conversations.im");
 			cap.setAttribute("ver", capHash);
 		}
 		return packet;
 	}
-}
\ No newline at end of file
+
+	public PresencePacket sendOfflinePresence(Account account) {
+		PresencePacket packet = new PresencePacket();
+		packet.setFrom(account.getJid());
+		packet.setAttribute("type","unavailable");
+		return packet;
+	}
+}
diff --git a/src/main/java/eu/siacs/conversations/http/HttpConnectionManager.java b/src/main/java/eu/siacs/conversations/http/HttpConnectionManager.java
index 9a2a2405..58a6d1e3 100644
--- a/src/main/java/eu/siacs/conversations/http/HttpConnectionManager.java
+++ b/src/main/java/eu/siacs/conversations/http/HttpConnectionManager.java
@@ -1,11 +1,22 @@
 package eu.siacs.conversations.http;
 
+import org.apache.http.conn.ssl.StrictHostnameVerifier;
+
+import java.security.KeyManagementException;
+import java.security.NoSuchAlgorithmException;
 import java.util.List;
 import java.util.concurrent.CopyOnWriteArrayList;
 
+import javax.net.ssl.HostnameVerifier;
+import javax.net.ssl.HttpsURLConnection;
+import javax.net.ssl.SSLContext;
+import javax.net.ssl.SSLSocketFactory;
+import javax.net.ssl.X509TrustManager;
+
 import eu.siacs.conversations.entities.Message;
 import eu.siacs.conversations.services.AbstractConnectionManager;
 import eu.siacs.conversations.services.XmppConnectionService;
+import eu.siacs.conversations.utils.CryptoHelper;
 
 public class HttpConnectionManager extends AbstractConnectionManager {
 
@@ -13,16 +24,67 @@ public class HttpConnectionManager extends AbstractConnectionManager {
 		super(service);
 	}
 
-	private List<HttpConnection> connections = new CopyOnWriteArrayList<HttpConnection>();
+	private List<HttpDownloadConnection> downloadConnections = new CopyOnWriteArrayList<>();
+	private List<HttpUploadConnection> uploadConnections = new CopyOnWriteArrayList<>();
+
+	public HttpDownloadConnection createNewDownloadConnection(Message message) {
+		return this.createNewDownloadConnection(message, false);
+	}
+
+	public HttpDownloadConnection createNewDownloadConnection(Message message, boolean interactive) {
+		HttpDownloadConnection connection = new HttpDownloadConnection(this);
+		connection.init(message,interactive);
+		this.downloadConnections.add(connection);
+		return connection;
+	}
 
-	public HttpConnection createNewConnection(Message message) {
-		HttpConnection connection = new HttpConnection(this);
+	public HttpUploadConnection createNewUploadConnection(Message message) {
+		HttpUploadConnection connection = new HttpUploadConnection(this);
 		connection.init(message);
-		this.connections.add(connection);
+		this.uploadConnections.add(connection);
 		return connection;
 	}
 
-	public void finishConnection(HttpConnection connection) {
-		this.connections.remove(connection);
+	public void finishConnection(HttpDownloadConnection connection) {
+		this.downloadConnections.remove(connection);
+	}
+
+	public void finishUploadConnection(HttpUploadConnection httpUploadConnection) {
+		this.uploadConnections.remove(httpUploadConnection);
+	}
+
+	public void setupTrustManager(final HttpsURLConnection connection, final boolean interactive) {
+		final X509TrustManager trustManager;
+		final HostnameVerifier hostnameVerifier;
+		if (interactive) {
+			trustManager = mXmppConnectionService.getMemorizingTrustManager();
+			hostnameVerifier = mXmppConnectionService
+					.getMemorizingTrustManager().wrapHostnameVerifier(
+							new StrictHostnameVerifier());
+		} else {
+			trustManager = mXmppConnectionService.getMemorizingTrustManager()
+					.getNonInteractive();
+			hostnameVerifier = mXmppConnectionService
+					.getMemorizingTrustManager()
+					.wrapHostnameVerifierNonInteractive(
+							new StrictHostnameVerifier());
+		}
+		try {
+			final SSLContext sc = SSLContext.getInstance("TLS");
+			sc.init(null, new X509TrustManager[]{trustManager},
+					mXmppConnectionService.getRNG());
+
+			final SSLSocketFactory sf = sc.getSocketFactory();
+			final String[] cipherSuites = CryptoHelper.getOrderedCipherSuites(
+					sf.getSupportedCipherSuites());
+			if (cipherSuites.length > 0) {
+				sc.getDefaultSSLParameters().setCipherSuites(cipherSuites);
+
+			}
+
+			connection.setSSLSocketFactory(sf);
+			connection.setHostnameVerifier(hostnameVerifier);
+		} catch (final KeyManagementException | NoSuchAlgorithmException ignored) {
+		}
 	}
 }
diff --git a/src/main/java/eu/siacs/conversations/http/HttpConnection.java b/src/main/java/eu/siacs/conversations/http/HttpDownloadConnection.java
index e7d30919..62fe4191 100644
--- a/src/main/java/eu/siacs/conversations/http/HttpConnection.java
+++ b/src/main/java/eu/siacs/conversations/http/HttpDownloadConnection.java
@@ -3,8 +3,7 @@ package eu.siacs.conversations.http;
 import android.content.Intent;
 import android.net.Uri;
 import android.os.SystemClock;
-
-import org.apache.http.conn.ssl.StrictHostnameVerifier;
+import android.util.Log;
 
 import java.io.BufferedInputStream;
 import java.io.IOException;
@@ -12,25 +11,20 @@ import java.io.OutputStream;
 import java.net.HttpURLConnection;
 import java.net.MalformedURLException;
 import java.net.URL;
-import java.security.KeyManagementException;
-import java.security.NoSuchAlgorithmException;
 import java.util.Arrays;
 
-import javax.net.ssl.HostnameVerifier;
 import javax.net.ssl.HttpsURLConnection;
-import javax.net.ssl.SSLContext;
 import javax.net.ssl.SSLHandshakeException;
-import javax.net.ssl.SSLSocketFactory;
-import javax.net.ssl.X509TrustManager;
 
 import eu.siacs.conversations.Config;
-import eu.siacs.conversations.entities.Downloadable;
+import eu.siacs.conversations.R;
+import eu.siacs.conversations.entities.Transferable;
 import eu.siacs.conversations.entities.DownloadableFile;
 import eu.siacs.conversations.entities.Message;
 import eu.siacs.conversations.services.XmppConnectionService;
 import eu.siacs.conversations.utils.CryptoHelper;
 
-public class HttpConnection implements Downloadable {
+public class HttpDownloadConnection implements Transferable {
 
 	private HttpConnectionManager mHttpConnectionManager;
 	private XmppConnectionService mXmppConnectionService;
@@ -38,12 +32,12 @@ public class HttpConnection implements Downloadable {
 	private URL mUrl;
 	private Message message;
 	private DownloadableFile file;
-	private int mStatus = Downloadable.STATUS_UNKNOWN;
+	private int mStatus = Transferable.STATUS_UNKNOWN;
 	private boolean acceptedAutomatically = false;
 	private int mProgress = 0;
 	private long mLastGuiRefresh = 0;
 
-	public HttpConnection(HttpConnectionManager manager) {
+	public HttpDownloadConnection(HttpConnectionManager manager) {
 		this.mHttpConnectionManager = manager;
 		this.mXmppConnectionService = manager.getXmppConnectionService();
 	}
@@ -63,8 +57,12 @@ public class HttpConnection implements Downloadable {
 	}
 
 	public void init(Message message) {
+		init(message, false);
+	}
+
+	public void init(Message message, boolean interactive) {
 		this.message = message;
-		this.message.setDownloadable(this);
+		this.message.setTransferable(this);
 		try {
 			mUrl = new URL(message.getBody());
 			String[] parts = mUrl.getPath().toLowerCase().split("\\.");
@@ -92,7 +90,7 @@ public class HttpConnection implements Downloadable {
 					&& this.file.getKey() == null) {
 				this.message.setEncryption(Message.ENCRYPTION_NONE);
 					}
-			checkFileSize(false);
+			checkFileSize(interactive);
 		} catch (MalformedURLException e) {
 			this.cancel();
 		}
@@ -104,7 +102,7 @@ public class HttpConnection implements Downloadable {
 
 	public void cancel() {
 		mHttpConnectionManager.finishConnection(this);
-		message.setDownloadable(null);
+		message.setTransferable(null);
 		mXmppConnectionService.updateConversationUi();
 	}
 
@@ -112,7 +110,7 @@ public class HttpConnection implements Downloadable {
 		Intent intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
 		intent.setData(Uri.fromFile(file));
 		mXmppConnectionService.sendBroadcast(intent);
-		message.setDownloadable(null);
+		message.setTransferable(null);
 		mHttpConnectionManager.finishConnection(this);
 		mXmppConnectionService.updateConversationUi();
 		if (acceptedAutomatically) {
@@ -125,42 +123,6 @@ public class HttpConnection implements Downloadable {
 		mXmppConnectionService.updateConversationUi();
 	}
 
-	private void setupTrustManager(final HttpsURLConnection connection,
-			final boolean interactive) {
-		final X509TrustManager trustManager;
-		final HostnameVerifier hostnameVerifier;
-		if (interactive) {
-			trustManager = mXmppConnectionService.getMemorizingTrustManager();
-			hostnameVerifier = mXmppConnectionService
-				.getMemorizingTrustManager().wrapHostnameVerifier(
-						new StrictHostnameVerifier());
-		} else {
-			trustManager = mXmppConnectionService.getMemorizingTrustManager()
-				.getNonInteractive();
-			hostnameVerifier = mXmppConnectionService
-				.getMemorizingTrustManager()
-				.wrapHostnameVerifierNonInteractive(
-						new StrictHostnameVerifier());
-		}
-		try {
-			final SSLContext sc = SSLContext.getInstance("TLS");
-			sc.init(null, new X509TrustManager[]{trustManager},
-					mXmppConnectionService.getRNG());
-
-			final SSLSocketFactory sf = sc.getSocketFactory();
-			final String[] cipherSuites = CryptoHelper.getOrderedCipherSuites(
-					sf.getSupportedCipherSuites());
-			if (cipherSuites.length > 0) {
-				sc.getDefaultSSLParameters().setCipherSuites(cipherSuites);
-
-			}
-
-			connection.setSSLSocketFactory(sf);
-			connection.setHostnameVerifier(hostnameVerifier);
-		} catch (final KeyManagementException | NoSuchAlgorithmException ignored) {
-		}
-	}
-
 	private class FileSizeChecker implements Runnable {
 
 		private boolean interactive = false;
@@ -176,43 +138,46 @@ public class HttpConnection implements Downloadable {
 				size = retrieveFileSize();
 			} catch (SSLHandshakeException e) {
 				changeStatus(STATUS_OFFER_CHECK_FILESIZE);
-				HttpConnection.this.acceptedAutomatically = false;
-				HttpConnection.this.mXmppConnectionService.getNotificationService().push(message);
+				HttpDownloadConnection.this.acceptedAutomatically = false;
+				HttpDownloadConnection.this.mXmppConnectionService.getNotificationService().push(message);
 				return;
 			} catch (IOException e) {
+				Log.d(Config.LOGTAG, "io exception in http file size checker: " + e.getMessage());
+				if (interactive) {
+					mXmppConnectionService.showErrorToastInUi(R.string.file_not_found_on_remote_host);
+				}
 				cancel();
 				return;
 			}
 			file.setExpectedSize(size);
 			if (size <= mHttpConnectionManager.getAutoAcceptFileSize()) {
-				HttpConnection.this.acceptedAutomatically = true;
+				HttpDownloadConnection.this.acceptedAutomatically = true;
 				new Thread(new FileDownloader(interactive)).start();
 			} else {
 				changeStatus(STATUS_OFFER);
-				HttpConnection.this.acceptedAutomatically = false;
-				HttpConnection.this.mXmppConnectionService.getNotificationService().push(message);
+				HttpDownloadConnection.this.acceptedAutomatically = false;
+				HttpDownloadConnection.this.mXmppConnectionService.getNotificationService().push(message);
 			}
 		}
 
-		private long retrieveFileSize() throws IOException,
-						SSLHandshakeException {
-							changeStatus(STATUS_CHECKING);
-							HttpURLConnection connection = (HttpURLConnection) mUrl
-								.openConnection();
-							connection.setRequestMethod("HEAD");
-							if (connection instanceof HttpsURLConnection) {
-								setupTrustManager((HttpsURLConnection) connection, interactive);
-							}
-							connection.connect();
-							String contentLength = connection.getHeaderField("Content-Length");
-							if (contentLength == null) {
-								throw new IOException();
-							}
-							try {
-								return Long.parseLong(contentLength, 10);
-							} catch (NumberFormatException e) {
-								throw new IOException();
-							}
+		private long retrieveFileSize() throws IOException {
+			Log.d(Config.LOGTAG,"retrieve file size. interactive:"+String.valueOf(interactive));
+			changeStatus(STATUS_CHECKING);
+			HttpURLConnection connection = (HttpURLConnection) mUrl.openConnection();
+			connection.setRequestMethod("HEAD");
+			if (connection instanceof HttpsURLConnection) {
+				mHttpConnectionManager.setupTrustManager((HttpsURLConnection) connection, interactive);
+			}
+			connection.connect();
+			String contentLength = connection.getHeaderField("Content-Length");
+			if (contentLength == null) {
+				throw new IOException();
+			}
+			try {
+				return Long.parseLong(contentLength, 10);
+			} catch (NumberFormatException e) {
+				throw new IOException();
+			}
 		}
 
 	}
@@ -235,19 +200,18 @@ public class HttpConnection implements Downloadable {
 			} catch (SSLHandshakeException e) {
 				changeStatus(STATUS_OFFER);
 			} catch (IOException e) {
+				mXmppConnectionService.showErrorToastInUi(R.string.file_not_found_on_remote_host);
 				cancel();
 			}
 		}
 
 		private void download() throws SSLHandshakeException, IOException {
-			HttpURLConnection connection = (HttpURLConnection) mUrl
-				.openConnection();
+			HttpURLConnection connection = (HttpURLConnection) mUrl.openConnection();
 			if (connection instanceof HttpsURLConnection) {
-				setupTrustManager((HttpsURLConnection) connection, interactive);
+				mHttpConnectionManager.setupTrustManager((HttpsURLConnection) connection, interactive);
 			}
 			connection.connect();
-			BufferedInputStream is = new BufferedInputStream(
-					connection.getInputStream());
+			BufferedInputStream is = new BufferedInputStream(connection.getInputStream());
 			file.getParentFile().mkdirs();
 			file.createNewFile();
 			OutputStream os = file.createOutputStream();
@@ -269,8 +233,8 @@ public class HttpConnection implements Downloadable {
 		}
 
 		private void updateImageBounds() {
-			message.setType(Message.TYPE_IMAGE);
-			mXmppConnectionService.getFileBackend().updateFileParams(message,mUrl);
+			message.setType(Message.TYPE_FILE);
+			mXmppConnectionService.getFileBackend().updateFileParams(message, mUrl);
 			mXmppConnectionService.updateMessage(message);
 		}
 
@@ -302,9 +266,4 @@ public class HttpConnection implements Downloadable {
 	public int getProgress() {
 		return this.mProgress;
 	}
-
-	@Override
-	public String getMimeType() {
-		return "";
-	}
 }
diff --git a/src/main/java/eu/siacs/conversations/http/HttpUploadConnection.java b/src/main/java/eu/siacs/conversations/http/HttpUploadConnection.java
new file mode 100644
index 00000000..a3ab8dab
--- /dev/null
+++ b/src/main/java/eu/siacs/conversations/http/HttpUploadConnection.java
@@ -0,0 +1,204 @@
+package eu.siacs.conversations.http;
+
+import android.app.PendingIntent;
+import android.util.Log;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.net.HttpURLConnection;
+import java.net.MalformedURLException;
+import java.net.URL;
+
+import javax.net.ssl.HttpsURLConnection;
+
+import eu.siacs.conversations.Config;
+import eu.siacs.conversations.entities.Account;
+import eu.siacs.conversations.entities.Transferable;
+import eu.siacs.conversations.entities.DownloadableFile;
+import eu.siacs.conversations.entities.Message;
+import eu.siacs.conversations.persistance.FileBackend;
+import eu.siacs.conversations.services.XmppConnectionService;
+import eu.siacs.conversations.ui.UiCallback;
+import eu.siacs.conversations.utils.CryptoHelper;
+import eu.siacs.conversations.utils.Xmlns;
+import eu.siacs.conversations.xml.Element;
+import eu.siacs.conversations.xmpp.OnIqPacketReceived;
+import eu.siacs.conversations.xmpp.jid.Jid;
+import eu.siacs.conversations.xmpp.stanzas.IqPacket;
+
+public class HttpUploadConnection implements Transferable {
+
+	private HttpConnectionManager mHttpConnectionManager;
+	private XmppConnectionService mXmppConnectionService;
+
+	private boolean canceled = false;
+	private Account account;
+	private DownloadableFile file;
+	private Message message;
+	private URL mGetUrl;
+	private URL mPutUrl;
+
+	private byte[] key = null;
+
+	private long transmitted = 0;
+	private long expected = 1;
+
+	public HttpUploadConnection(HttpConnectionManager httpConnectionManager) {
+		this.mHttpConnectionManager = httpConnectionManager;
+		this.mXmppConnectionService = httpConnectionManager.getXmppConnectionService();
+	}
+
+	@Override
+	public boolean start() {
+		return false;
+	}
+
+	@Override
+	public int getStatus() {
+		return STATUS_UPLOADING;
+	}
+
+	@Override
+	public long getFileSize() {
+		return this.file.getExpectedSize();
+	}
+
+	@Override
+	public int getProgress() {
+		return (int) ((((double) transmitted) / expected) * 100);
+	}
+
+	@Override
+	public void cancel() {
+		this.canceled = true;
+	}
+
+	private void fail() {
+		mHttpConnectionManager.finishUploadConnection(this);
+		message.setTransferable(null);
+		mXmppConnectionService.markMessage(message,Message.STATUS_SEND_FAILED);
+	}
+
+	public void init(Message message) {
+		this.message = message;
+		message.setTransferable(this);
+		mXmppConnectionService.markMessage(message,Message.STATUS_UNSEND);
+		this.account = message.getConversation().getAccount();
+		this.file = mXmppConnectionService.getFileBackend().getFile(message, false);
+		this.file.setExpectedSize(this.file.getSize());
+
+		if (Config.ENCRYPT_ON_HTTP_UPLOADED) {
+			this.key = new byte[48];
+			mXmppConnectionService.getRNG().nextBytes(this.key);
+			this.file.setKey(this.key);
+		}
+
+		Jid host = account.getXmppConnection().findDiscoItemByFeature(Xmlns.HTTP_UPLOAD);
+		IqPacket request = mXmppConnectionService.getIqGenerator().requestHttpUploadSlot(host,file);
+		mXmppConnectionService.sendIqPacket(account, request, new OnIqPacketReceived() {
+			@Override
+			public void onIqPacketReceived(Account account, IqPacket packet) {
+				if (packet.getType() == IqPacket.TYPE.RESULT) {
+					Element slot = packet.findChild("slot",Xmlns.HTTP_UPLOAD);
+					if (slot != null) {
+						try {
+							mGetUrl = new URL(slot.findChildContent("get"));
+							mPutUrl = new URL(slot.findChildContent("put"));
+							if (!canceled) {
+								new Thread(new FileUploader()).start();
+							}
+						} catch (MalformedURLException e) {
+							fail();
+						}
+					} else {
+						fail();
+					}
+				} else {
+					fail();
+				}
+			}
+		});
+	}
+
+	private class FileUploader implements Runnable {
+
+		@Override
+		public void run() {
+			this.upload();
+		}
+
+		private void upload() {
+			OutputStream os = null;
+			InputStream is = null;
+			HttpURLConnection connection = null;
+			try {
+				Log.d(Config.LOGTAG, "uploading to " + mPutUrl.toString());
+				connection = (HttpURLConnection) mPutUrl.openConnection();
+				if (connection instanceof HttpsURLConnection) {
+					mHttpConnectionManager.setupTrustManager((HttpsURLConnection) connection, true);
+				}
+				connection.setRequestMethod("PUT");
+				connection.setFixedLengthStreamingMode((int) file.getExpectedSize());
+				connection.setDoOutput(true);
+				connection.connect();
+				os = connection.getOutputStream();
+				is = file.createInputStream();
+				transmitted = 0;
+				expected = file.getExpectedSize();
+				int count = -1;
+				byte[] buffer = new byte[4096];
+				while (((count = is.read(buffer)) != -1) && !canceled) {
+					transmitted += count;
+					os.write(buffer, 0, count);
+					mXmppConnectionService.updateConversationUi();
+				}
+				os.flush();
+				os.close();
+				is.close();
+				int code = connection.getResponseCode();
+				if (code == 200 || code == 201) {
+					Log.d(Config.LOGTAG, "finished uploading file");
+					Message.FileParams params = message.getFileParams();
+					if (key != null) {
+						mGetUrl = new URL(mGetUrl.toString() + "#" + CryptoHelper.bytesToHex(key));
+					}
+					mXmppConnectionService.getFileBackend().updateFileParams(message, mGetUrl);
+					message.setTransferable(null);
+					message.setCounterpart(message.getConversation().getJid().toBareJid());
+					if (message.getEncryption() == Message.ENCRYPTION_DECRYPTED) {
+						mXmppConnectionService.getPgpEngine().encrypt(message, new UiCallback<Message>() {
+							@Override
+							public void success(Message message) {
+								mXmppConnectionService.resendMessage(message);
+							}
+
+							@Override
+							public void error(int errorCode, Message object) {
+								fail();
+							}
+
+							@Override
+							public void userInputRequried(PendingIntent pi, Message object) {
+								fail();
+							}
+						});
+					} else {
+						mXmppConnectionService.resendMessage(message);
+					}
+				} else {
+					fail();
+				}
+			} catch (IOException e) {
+				Log.d(Config.LOGTAG, e.getMessage());
+				fail();
+			} finally {
+				FileBackend.close(is);
+				FileBackend.close(os);
+				if (connection != null) {
+					connection.disconnect();
+				}
+			}
+		}
+	}
+}
diff --git a/src/main/java/eu/siacs/conversations/parser/AbstractParser.java b/src/main/java/eu/siacs/conversations/parser/AbstractParser.java
index 473195bd..11ddcc13 100644
--- a/src/main/java/eu/siacs/conversations/parser/AbstractParser.java
+++ b/src/main/java/eu/siacs/conversations/parser/AbstractParser.java
@@ -15,6 +15,7 @@ import eu.siacs.conversations.entities.Contact;
 import eu.siacs.conversations.services.XmppConnectionService;
 import eu.siacs.conversations.xml.Element;
 import eu.siacs.conversations.xmpp.jid.Jid;
+import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
 
 public abstract class AbstractParser {
 
@@ -33,24 +34,23 @@ public abstract class AbstractParser {
      *  attribute or the current time is less than the value of the 'stamp'
      *  attribute the current time is returned.
      */
-	protected long getTimestamp(Element packet) {
-		long now = System.currentTimeMillis();
-		Element delay = packet.findChild("delay");
-		if (delay == null) {
-			return now;
-		}
-		String stamp = delay.getAttribute("stamp");
-		if (stamp == null) {
-			return now;
+	public static Long getTimestamp(Element element, Long defaultValue) {
+		Element delay = element.findChild("delay","urn:xmpp:delay");
+		if (delay != null) {
+			String stamp = delay.getAttribute("stamp");
+			if (stamp != null) {
+				try {
+					return AbstractParser.parseTimestamp(delay.getAttribute("stamp")).getTime();
+				} catch (ParseException e) {
+					return defaultValue;
+				}
+			}
 		}
-        /*long time = parseTimestamp(stamp).getTime();
-        return now < time ? now : time;*/
-        try {
-            long time = parseTimestamp(stamp).getTime();
-            return now < time ? now : time;
-        } catch (ParseException e) {
-            return now;
-        }
+		return defaultValue;
+	}
+
+	protected long getTimestamp(Element packet) {
+		return getTimestamp(packet,System.currentTimeMillis());
 	}
 
     /**
@@ -82,8 +82,7 @@ public abstract class AbstractParser {
         updateLastseen(packet, account, from, presenceOverwrite);
     }
 
-    protected void updateLastseen(final Element packet, final Account account, final Jid from,
-                                  final boolean presenceOverwrite) {
+	protected void updateLastseen(final Element packet, final Account account, final Jid from, final boolean presenceOverwrite) {
 		final String presence = from == null || from.isBareJid() ? "" : from.getResourcepart();
 		final Contact contact = account.getRoster().getContact(from);
 		final long timestamp = getTimestamp(packet);
@@ -100,10 +99,6 @@ public abstract class AbstractParser {
 		if (item == null) {
 			return null;
 		}
-		Element data = item.findChild("data", "urn:xmpp:avatar:data");
-		if (data == null) {
-			return null;
-		}
-		return data.getContent();
+		return item.findChildContent("data", "urn:xmpp:avatar:data");
 	}
 }
diff --git a/src/main/java/eu/siacs/conversations/parser/MessageParser.java b/src/main/java/eu/siacs/conversations/parser/MessageParser.java
index 9f36f1e9..81fd89cd 100644
--- a/src/main/java/eu/siacs/conversations/parser/MessageParser.java
+++ b/src/main/java/eu/siacs/conversations/parser/MessageParser.java
@@ -1,9 +1,13 @@
 package eu.siacs.conversations.parser;
 
+import android.util.Log;
+import android.util.Pair;
+
 import net.java.otr4j.session.Session;
 import net.java.otr4j.session.SessionStatus;
 
 import de.tzur.conversations.Settings;
+import eu.siacs.conversations.Config;
 import eu.siacs.conversations.entities.Account;
 import eu.siacs.conversations.entities.Contact;
 import eu.siacs.conversations.entities.Conversation;
@@ -26,12 +30,12 @@ public class MessageParser extends AbstractParser implements
 		super(service);
 	}
 
-	private boolean extractChatState(Conversation conversation, final Element element) {
-		ChatState state = ChatState.parse(element);
+	private boolean extractChatState(Conversation conversation, final MessagePacket packet) {
+		ChatState state = ChatState.parse(packet);
 		if (state != null && conversation != null) {
 			final Account account = conversation.getAccount();
-			Jid from = element.getAttributeAsJid("from");
-			if (from != null && from.toBareJid().equals(account.getJid().toBareJid())) {
+			Jid from = packet.getFrom();
+			if (from.toBareJid().equals(account.getJid().toBareJid())) {
 				conversation.setOutgoingChatState(state);
 				return false;
 			} else {
@@ -41,99 +45,40 @@ public class MessageParser extends AbstractParser implements
 		return false;
 	}
 
-	private Message parseChat(MessagePacket packet, Account account) {
-		final Jid jid = packet.getFrom();
-		if (jid == null) {
-			return null;
-		}
-		Conversation conversation = mXmppConnectionService.findOrCreateConversation(account, jid.toBareJid(), false);
-		String pgpBody = getPgpBody(packet);
-		Message finishedMessage;
-		if (pgpBody != null) {
-			finishedMessage = new Message(conversation,
-					pgpBody, Message.ENCRYPTION_PGP, Message.STATUS_RECEIVED);
-		} else {
-			finishedMessage = new Message(conversation,
-					packet.getBody(), Message.ENCRYPTION_NONE,
-					Message.STATUS_RECEIVED);
-		}
-		finishedMessage.setRemoteMsgId(packet.getId());
-		finishedMessage.markable = isMarkable(packet);
-		if (conversation.getMode() == Conversation.MODE_MULTI
-				&& !jid.isBareJid()) {
-			final Jid trueCounterpart = conversation.getMucOptions()
-					.getTrueCounterpart(jid.getResourcepart());
-			if (trueCounterpart != null) {
-				updateLastseen(packet, account, trueCounterpart, false);
-			}
-			finishedMessage.setType(Message.TYPE_PRIVATE);
-			finishedMessage.setTrueCounterpart(trueCounterpart);
-			if (conversation.hasDuplicateMessage(finishedMessage)) {
-				return null;
-			}
-		} else {
-			updateLastseen(packet, account, true);
-		}
-		finishedMessage.setCounterpart(jid);
-		finishedMessage.setTime(getTimestamp(packet));
-		extractChatState(conversation,packet);
-		return finishedMessage;
-	}
-
-	private Message parseOtrChat(MessagePacket packet, Account account) {
-		final Jid to = packet.getTo();
-		final Jid from = packet.getFrom();
-		if (to == null || from == null) {
-			return null;
-		}
-		boolean properlyAddressed = !to.isBareJid() || account.countPresences() == 1;
-		Conversation conversation = mXmppConnectionService
-				.findOrCreateConversation(account, from.toBareJid(), false);
+	private Message parseOtrChat(String body, Jid from, String id, Conversation conversation) {
 		String presence;
 		if (from.isBareJid()) {
 			presence = "";
 		} else {
 			presence = from.getResourcepart();
 		}
-		extractChatState(conversation, packet);
-		updateLastseen(packet, account, true);
-		String body = packet.getBody();
 		if (body.matches("^\\?OTRv\\d{1,2}\\?.*")) {
 			conversation.endOtrIfNeeded();
 		}
 		if (!conversation.hasValidOtrSession()) {
-			if (properlyAddressed) {
-				conversation.startOtrSession(presence,false);
-			} else {
-				return null;
-			}
+			conversation.startOtrSession(presence,false);
 		} else {
-			String foreignPresence = conversation.getOtrSession()
-					.getSessionID().getUserID();
+			String foreignPresence = conversation.getOtrSession().getSessionID().getUserID();
 			if (!foreignPresence.equals(presence)) {
 				conversation.endOtrIfNeeded();
-				if (properlyAddressed) {
-					conversation.startOtrSession(presence, false);
-				} else {
-					return null;
-				}
+				conversation.startOtrSession(presence, false);
 			}
 		}
 		try {
-			conversation.setLastReceivedOtrMessageId(packet.getId());
+			conversation.setLastReceivedOtrMessageId(id);
 			Session otrSession = conversation.getOtrSession();
-			SessionStatus before = otrSession.getSessionStatus();
 			body = otrSession.transformReceiving(body);
-			SessionStatus after = otrSession.getSessionStatus();
-			if ((before != after) && (after == SessionStatus.ENCRYPTED)) {
+			SessionStatus status = otrSession.getSessionStatus();
+			if (body == null && status == SessionStatus.ENCRYPTED) {
 				conversation.setNextEncryption(Message.ENCRYPTION_OTR);
 				mXmppConnectionService.onOtrSessionEstablished(conversation);
-			} else if ((before != after) && (after == SessionStatus.FINISHED)) {
+				return null;
+			} else if (body == null && status == SessionStatus.FINISHED) {
 				conversation.setNextEncryption(Message.ENCRYPTION_NONE);
 				conversation.resetOtrSession();
 				mXmppConnectionService.updateConversationUi();
-			}
-			if ((body == null) || (body.isEmpty())) {
+				return null;
+			} else if (body == null || (body.isEmpty())) {
 				return null;
 			}
 			if (body.startsWith(CryptoHelper.FILETRANSFER)) {
@@ -141,12 +86,7 @@ public class MessageParser extends AbstractParser implements
 				conversation.setSymmetricKey(CryptoHelper.hexToBytes(key));
 				return null;
 			}
-			Message finishedMessage = new Message(conversation, body, Message.ENCRYPTION_OTR,
-					Message.STATUS_RECEIVED);
-			finishedMessage.setTime(getTimestamp(packet));
-			finishedMessage.setRemoteMsgId(packet.getId());
-			finishedMessage.markable = isMarkable(packet);
-			finishedMessage.setCounterpart(from);
+			Message finishedMessage = new Message(conversation, body, Message.ENCRYPTION_OTR, Message.STATUS_RECEIVED);
 			conversation.setLastReceivedOtrMessageId(null);
 			return finishedMessage;
 		} catch (Exception e) {
@@ -155,499 +95,343 @@ public class MessageParser extends AbstractParser implements
 		}
 	}
 
-	private Message parseGroupchat(MessagePacket packet, Account account) {
-		int status;
-		final Jid from = packet.getFrom();
-		if (from == null) {
-			return null;
-		}
-		if (mXmppConnectionService.find(account.pendingConferenceLeaves,
-				account, from.toBareJid()) != null) {
-			return null;
-		}
-		Conversation conversation = mXmppConnectionService
-				.findOrCreateConversation(account, from.toBareJid(), true);
-		final Jid trueCounterpart = conversation.getMucOptions().getTrueCounterpart(from.getResourcepart());
-		if (trueCounterpart != null) {
-			updateLastseen(packet, account, trueCounterpart, false);
-		}
-		if (packet.hasChild("subject")) {
-			conversation.setHasMessagesLeftOnServer(true);
-			conversation.getMucOptions().setSubject(packet.findChild("subject").getContent());
-			mXmppConnectionService.updateConversationUi();
-			return null;
+	private class Invite {
+		Jid jid;
+		String password;
+		Invite(Jid jid, String password) {
+			this.jid = jid;
+			this.password = password;
 		}
 
-		final Element x = packet.findChild("x", "http://jabber.org/protocol/muc#user");
-		if (from.isBareJid() && (x == null || !x.hasChild("status"))) {
-			return null;
-		} else if (from.isBareJid() && x.hasChild("status")) {
-			for(Element child : x.getChildren()) {
-				if (child.getName().equals("status")) {
-					String code = child.getAttribute("code");
-					if (code.contains(MucOptions.STATUS_CODE_ROOM_CONFIG_CHANGED)) {
-						mXmppConnectionService.fetchConferenceConfiguration(conversation);
-					}
+		public boolean execute(Account account) {
+			if (jid != null) {
+				Conversation conversation = mXmppConnectionService.findOrCreateConversation(account, jid, true);
+				if (!conversation.getMucOptions().online()) {
+					conversation.getMucOptions().setPassword(password);
+					mXmppConnectionService.databaseBackend.updateConversation(conversation);
+					mXmppConnectionService.joinMuc(conversation);
+					mXmppConnectionService.updateConversationUi();
 				}
+				return true;
 			}
-			return null;
+			return false;
 		}
+	}
 
-		if (from.getResourcepart().equals(conversation.getMucOptions().getActualNick())) {
-			if (mXmppConnectionService.markMessage(conversation,
-					packet.getId(), Message.STATUS_SEND_RECEIVED)) {
-				return null;
-			} else if (packet.getId() == null) {
-				Message message = conversation.findSentMessageWithBody(packet.getBody());
-				if (message != null) {
-					mXmppConnectionService.markMessage(message,Message.STATUS_SEND_RECEIVED);
-					return null;
-				} else {
-					status = Message.STATUS_SEND;
-				}
-			} else {
-				status = Message.STATUS_SEND;
+	private Invite extractInvite(Element message) {
+		Element x = message.findChild("x", "http://jabber.org/protocol/muc#user");
+		if (x != null) {
+			Element invite = x.findChild("invite");
+			if (invite != null) {
+				Element pw = x.findChild("password");
+				return new Invite(message.getAttributeAsJid("from"), pw != null ? pw.getContent(): null);
 			}
 		} else {
-			status = Message.STATUS_RECEIVED;
-		}
-		String pgpBody = getPgpBody(packet);
-		Message finishedMessage;
-		if (pgpBody == null) {
-			finishedMessage = new Message(conversation,
-					packet.getBody(), Message.ENCRYPTION_NONE, status);
-		} else {
-			finishedMessage = new Message(conversation, pgpBody,
-					Message.ENCRYPTION_PGP, status);
-		}
-		finishedMessage.setRemoteMsgId(packet.getId());
-		finishedMessage.markable = isMarkable(packet);
-		finishedMessage.setCounterpart(from);
-		if (status == Message.STATUS_RECEIVED) {
-			finishedMessage.setTrueCounterpart(conversation.getMucOptions()
-					.getTrueCounterpart(from.getResourcepart()));
-		}
-		if (packet.hasChild("delay")
-				&& conversation.hasDuplicateMessage(finishedMessage)) {
-			return null;
+			x = message.findChild("x","jabber:x:conference");
+			if (x != null) {
+				return new Invite(x.getAttributeAsJid("jid"),x.getAttribute("password"));
+			}
 		}
-		finishedMessage.setTime(getTimestamp(packet));
-		return finishedMessage;
+		return null;
 	}
 
-	private Message parseCarbonMessage(final MessagePacket packet, final Account account) {
-		int status;
-		final Jid fullJid;
-		Element forwarded;
-		if (packet.hasChild("received", "urn:xmpp:carbons:2")) {
-			forwarded = packet.findChild("received", "urn:xmpp:carbons:2")
-					.findChild("forwarded", "urn:xmpp:forward:0");
-			status = Message.STATUS_RECEIVED;
-		} else if (packet.hasChild("sent", "urn:xmpp:carbons:2")) {
-			forwarded = packet.findChild("sent", "urn:xmpp:carbons:2")
-					.findChild("forwarded", "urn:xmpp:forward:0");
-			status = Message.STATUS_SEND;
-		} else {
-			return null;
-		}
-		if (forwarded == null) {
-			return null;
-		}
-		Element message = forwarded.findChild("message");
-		if (message == null) {
-			return null;
-		}
-		if (!message.hasChild("body")) {
-			if (status == Message.STATUS_RECEIVED
-					&& message.getAttribute("from") != null) {
-				parseNonMessage(message, account);
-			} else if (status == Message.STATUS_SEND
-					&& message.hasChild("displayed", "urn:xmpp:chat-markers:0")) {
-				final Jid to = message.getAttributeAsJid("to");
-				if (to != null) {
-					final Conversation conversation = mXmppConnectionService.find(
-							mXmppConnectionService.getConversations(), account,
-							to.toBareJid());
-					if (conversation != null) {
-						mXmppConnectionService.markRead(conversation);
+	private void parseEvent(final Element event, final Jid from, final Account account) {
+		Element items = event.findChild("items");
+		String node = items == null ? null : items.getAttribute("node");
+		if ("urn:xmpp:avatar:metadata".equals(node)) {
+			Avatar avatar = Avatar.parseMetadata(items);
+			if (avatar != null) {
+				avatar.owner = from;
+				if (mXmppConnectionService.getFileBackend().isAvatarCached(avatar)) {
+					if (account.getJid().toBareJid().equals(from)) {
+						if (account.setAvatar(avatar.getFilename())) {
+							mXmppConnectionService.databaseBackend.updateAccount(account);
+						}
+						mXmppConnectionService.getAvatarService().clear(account);
+						mXmppConnectionService.updateConversationUi();
+						mXmppConnectionService.updateAccountUi();
+					} else {
+						Contact contact = account.getRoster().getContact(from);
+						contact.setAvatar(avatar);
+						mXmppConnectionService.getAvatarService().clear(contact);
+						mXmppConnectionService.updateConversationUi();
+						mXmppConnectionService.updateRosterUi();
 					}
+				} else {
+					mXmppConnectionService.fetchAvatar(account, avatar);
 				}
 			}
-			return null;
-		}
-		if (status == Message.STATUS_RECEIVED) {
-			fullJid = message.getAttributeAsJid("from");
-			if (fullJid == null) {
-				return null;
-			} else {
-				updateLastseen(message, account, true);
-			}
-		} else {
-			fullJid = message.getAttributeAsJid("to");
-			if (fullJid == null) {
-				return null;
+		} else if ("http://jabber.org/protocol/nick".equals(node)) {
+			Element i = items.findChild("item");
+			Element nick = i == null ? null : i.findChild("nick", "http://jabber.org/protocol/nick");
+			if (nick != null) {
+				Contact contact = account.getRoster().getContact(from);
+				contact.setPresenceName(nick.getContent());
+				mXmppConnectionService.getAvatarService().clear(account);
+				mXmppConnectionService.updateConversationUi();
+				mXmppConnectionService.updateAccountUi();
 			}
 		}
-		if (message.hasChild("x","http://jabber.org/protocol/muc#user")
-				&& "chat".equals(message.getAttribute("type"))) {
-			return null;
-		}
-		Conversation conversation = mXmppConnectionService
-				.findOrCreateConversation(account, fullJid.toBareJid(), false);
-		String pgpBody = getPgpBody(message);
-		Message finishedMessage;
-		if (pgpBody != null) {
-			finishedMessage = new Message(conversation, pgpBody,
-					Message.ENCRYPTION_PGP, status);
-		} else {
-			String body = message.findChild("body").getContent();
-			finishedMessage = new Message(conversation, body,
-					Message.ENCRYPTION_NONE, status);
-		}
-		extractChatState(conversation,message);
-		finishedMessage.setTime(getTimestamp(message));
-		finishedMessage.setRemoteMsgId(message.getAttribute("id"));
-		finishedMessage.markable = isMarkable(message);
-		finishedMessage.setCounterpart(fullJid);
-		if (conversation.getMode() == Conversation.MODE_MULTI
-				&& !fullJid.isBareJid()) {
-			finishedMessage.setType(Message.TYPE_PRIVATE);
-			finishedMessage.setTrueCounterpart(conversation.getMucOptions()
-					.getTrueCounterpart(fullJid.getResourcepart()));
-			if (conversation.hasDuplicateMessage(finishedMessage)) {
-				return null;
+	}
+
+	private boolean handleErrorMessage(Account account, MessagePacket packet) {
+		if (packet.getType() == MessagePacket.TYPE_ERROR) {
+			Jid from = packet.getFrom();
+			if (from != null) {
+				Message message = mXmppConnectionService.markMessage(account,
+						from.toBareJid(),
+						packet.getId(),
+						Message.STATUS_SEND_FAILED);
+				if (message != null && message.getEncryption() == Message.ENCRYPTION_OTR) {
+					message.getConversation().endOtrIfNeeded();
+				}
 			}
+			return true;
 		}
-		return finishedMessage;
+		return false;
 	}
 
-	private Message parseMamMessage(MessagePacket packet, final Account account) {
-		final Element result = packet.findChild("result","urn:xmpp:mam:0");
-		if (result == null ) {
-			return null;
-		}
-		final MessageArchiveService.Query query = this.mXmppConnectionService.getMessageArchiveService().findQuery(result.getAttribute("queryid"));
-		if (query!=null) {
-			query.incrementTotalCount();
-		}
-		final Element forwarded = result.findChild("forwarded","urn:xmpp:forward:0");
-		if (forwarded == null) {
-			return null;
-		}
-		final Element message = forwarded.findChild("message");
-		if (message == null) {
-			return null;
+	@Override
+	public void onMessagePacketReceived(Account account, MessagePacket original) {
+		if (handleErrorMessage(account, original)) {
+			return;
 		}
-		final Element body = message.findChild("body");
-		if (body == null || message.hasChild("private","urn:xmpp:carbons:2") || message.hasChild("no-copy","urn:xmpp:hints")) {
-			return null;
+		final MessagePacket packet;
+		Long timestamp = null;
+		final boolean isForwarded;
+		String serverMsgId = null;
+		final Element fin = original.findChild("fin", "urn:xmpp:mam:0");
+		if (fin != null) {
+			mXmppConnectionService.getMessageArchiveService().processFin(fin,original.getFrom());
+			return;
 		}
-		int encryption;
-		String content = getPgpBody(message);
-		if (content != null) {
-			encryption = Message.ENCRYPTION_PGP;
+		final Element result = original.findChild("result","urn:xmpp:mam:0");
+		final MessageArchiveService.Query query = result == null ? null : mXmppConnectionService.getMessageArchiveService().findQuery(result.getAttribute("queryid"));
+		if (query != null && query.validFrom(original.getFrom())) {
+			Pair<MessagePacket, Long> f = original.getForwardedMessagePacket("result", "urn:xmpp:mam:0");
+			if (f == null) {
+				return;
+			}
+			timestamp = f.second;
+			packet = f.first;
+			isForwarded = true;
+			serverMsgId = result.getAttribute("id");
+			query.incrementTotalCount();
+		} else if (query != null) {
+			Log.d(Config.LOGTAG,account.getJid().toBareJid()+": received mam result from invalid sender");
+			return;
+		} else if (original.fromServer(account)) {
+			Pair<MessagePacket, Long> f;
+			f = original.getForwardedMessagePacket("received", "urn:xmpp:carbons:2");
+			f = f == null ? original.getForwardedMessagePacket("sent", "urn:xmpp:carbons:2") : f;
+			packet = f != null ? f.first : original;
+			if (handleErrorMessage(account, packet)) {
+				return;
+			}
+			timestamp = f != null ? f.second : null;
+			isForwarded = f != null;
 		} else {
-			encryption = Message.ENCRYPTION_NONE;
-			content = body.getContent();
+			packet = original;
+			isForwarded = false;
 		}
-		if (content == null) {
-			return null;
+
+		if (timestamp == null) {
+			timestamp = AbstractParser.getTimestamp(packet, System.currentTimeMillis());
 		}
-		final long timestamp = getTimestamp(forwarded);
-		final Jid to = message.getAttributeAsJid("to");
-		final Jid from = message.getAttributeAsJid("from");
-		Jid counterpart;
+		final String body = packet.getBody();
+		final String encrypted = packet.findChildContent("x", "jabber:x:encrypted");
+		final Element mucUserElement = packet.findChild("x","http://jabber.org/protocol/muc#user");
 		int status;
-		Conversation conversation;
-		if (from!=null && to != null && from.toBareJid().equals(account.getJid().toBareJid())) {
+		final Jid counterpart;
+		final Jid to = packet.getTo();
+		final Jid from = packet.getFrom();
+		final String remoteMsgId = packet.getId();
+
+		if (from == null || to == null) {
+			Log.d(Config.LOGTAG,"no to or from in: "+packet.toString());
+			return;
+		}
+		
+		boolean isTypeGroupChat = packet.getType() == MessagePacket.TYPE_GROUPCHAT;
+		boolean isProperlyAddressed = !to.isBareJid() || account.countPresences() == 1;
+		boolean isMucStatusMessage = from.isBareJid() && mucUserElement != null && mucUserElement.hasChild("status");
+		if (packet.fromAccount(account)) {
 			status = Message.STATUS_SEND;
-			conversation = this.mXmppConnectionService.findOrCreateConversation(account,to.toBareJid(),false,query);
 			counterpart = to;
-		} else if (from !=null && to != null) {
+		} else {
 			status = Message.STATUS_RECEIVED;
-			conversation = this.mXmppConnectionService.findOrCreateConversation(account,from.toBareJid(),false,query);
 			counterpart = from;
-		} else {
-			return null;
-		}
-		Message finishedMessage = new Message(conversation,content,encryption,status);
-		finishedMessage.setTime(timestamp);
-		finishedMessage.setCounterpart(counterpart);
-		finishedMessage.setRemoteMsgId(message.getAttribute("id"));
-		finishedMessage.setServerMsgId(result.getAttribute("id"));
-		if (conversation.hasDuplicateMessage(finishedMessage)) {
-			return null;
 		}
-		if (query!=null) {
-			query.incrementMessageCount();
-		}
-		return finishedMessage;
-	}
-
-	private void parseError(final MessagePacket packet, final Account account) {
-		final Jid from = packet.getFrom();
-		mXmppConnectionService.markMessage(account, from.toBareJid(),
-				packet.getId(), Message.STATUS_SEND_FAILED);
-	}
 
-	private void parseNonMessage(Element packet, Account account) {
-		final Jid from = packet.getAttributeAsJid("from");
-		if (extractChatState(from == null ? null : mXmppConnectionService.find(account,from), packet)) {
-			mXmppConnectionService.updateConversationUi();
-		}
-		Element invite = extractInvite(packet);
-		if (invite != null) {
-			Conversation conversation = mXmppConnectionService.findOrCreateConversation(account, from, true);
-			if (!conversation.getMucOptions().online()) {
-				Element password = invite.findChild("password");
-				conversation.getMucOptions().setPassword(password == null ? null : password.getContent());
-				mXmppConnectionService.databaseBackend.updateConversation(conversation);
-				mXmppConnectionService.joinMuc(conversation);
-				mXmppConnectionService.updateConversationUi();
-			}
-		}
-		if (packet.hasChild("event", "http://jabber.org/protocol/pubsub#event")) {
-			Element event = packet.findChild("event",
-					"http://jabber.org/protocol/pubsub#event");
-			parseEvent(event, from, account);
-		} else if (from != null && packet.hasChild("displayed", "urn:xmpp:chat-markers:0")) {
-			String id = packet
-					.findChild("displayed", "urn:xmpp:chat-markers:0")
-					.getAttribute("id");
-			updateLastseen(packet, account, true);
-			final Message displayedMessage = mXmppConnectionService.markMessage(account, from.toBareJid(), id, Message.STATUS_SEND_DISPLAYED);
-			Message message = displayedMessage == null ? null :displayedMessage.prev();
-			while (message != null
-					&& message.getStatus() == Message.STATUS_SEND_RECEIVED
-					&& message.getTimeSent() < displayedMessage.getTimeSent()) {
-				mXmppConnectionService.markMessage(message, Message.STATUS_SEND_DISPLAYED);
-				message = message.prev();
-			}
-		} else if (from != null
-				&& packet.hasChild("received", "urn:xmpp:chat-markers:0")) {
-			String id = packet.findChild("received", "urn:xmpp:chat-markers:0")
-					.getAttribute("id");
-			updateLastseen(packet, account, false);
-			mXmppConnectionService.markMessage(account, from.toBareJid(),
-					id, Message.STATUS_SEND_RECEIVED);
-		} else if (from != null
-				&& packet.hasChild("received", "urn:xmpp:receipts")) {
-			String id = packet.findChild("received", "urn:xmpp:receipts")
-					.getAttribute("id");
-			updateLastseen(packet, account, false);
-			mXmppConnectionService.markMessage(account, from.toBareJid(),
-					id, Message.STATUS_SEND_RECEIVED);
+		Invite invite = extractInvite(packet);
+		if (invite != null && invite.execute(account)) {
+			return;
 		}
-	}
 
-	private Element extractInvite(Element message) {
-		Element x = message.findChild("x","http://jabber.org/protocol/muc#user");
-		if (x == null) {
-			x = message.findChild("x","jabber:x:conference");
-		}
-		if (x != null && x.hasChild("invite")) {
-			return x;
-		} else {
-			return null;
+		if (extractChatState(mXmppConnectionService.find(account,from), packet)) {
+			mXmppConnectionService.updateConversationUi();
 		}
-	}
 
-	private void parseEvent(final Element event, final Jid from, final Account account) {
-		Element items = event.findChild("items");
-		if (items == null) {
-			return;
-		}
-		String node = items.getAttribute("node");
-		if (node == null) {
-			return;
-		}
-		if (node.equals("urn:xmpp:avatar:metadata")) {
-			Avatar avatar = Avatar.parseMetadata(items);
-			if (avatar != null) {
-				avatar.owner = from;
-				if (mXmppConnectionService.getFileBackend().isAvatarCached(
-						avatar)) {
-					if (account.getJid().toBareJid().equals(from)) {
-						if (account.setAvatar(avatar.getFilename())) {
-							mXmppConnectionService.databaseBackend
-									.updateAccount(account);
-						}
-						mXmppConnectionService.getAvatarService().clear(
-								account);
-						mXmppConnectionService.updateConversationUi();
-						mXmppConnectionService.updateAccountUi();
+		if ((body != null || encrypted != null) && !isMucStatusMessage) {
+			Conversation conversation = mXmppConnectionService.findOrCreateConversation(account, counterpart.toBareJid(), isTypeGroupChat);
+			if (isTypeGroupChat) {
+				if (counterpart.getResourcepart().equals(conversation.getMucOptions().getActualNick())) {
+					status = Message.STATUS_SEND_RECEIVED;
+					if (mXmppConnectionService.markMessage(conversation, remoteMsgId, status)) {
+						return;
 					} else {
-						Contact contact = account.getRoster().getContact(
-								from);
-						contact.setAvatar(avatar.getFilename());
-						mXmppConnectionService.getAvatarService().clear(
-								contact);
-						mXmppConnectionService.updateConversationUi();
-						mXmppConnectionService.updateRosterUi();
+						Message message = conversation.findSentMessageWithBody(body);
+						if (message != null) {
+							message.setRemoteMsgId(remoteMsgId);
+							mXmppConnectionService.markMessage(message, status);
+							return;
+						}
 					}
 				} else {
-					mXmppConnectionService.fetchAvatar(account, avatar);
+					status = Message.STATUS_RECEIVED;
 				}
 			}
-		} else if (node.equals("http://jabber.org/protocol/nick")) {
-			Element item = items.findChild("item");
-			if (item != null) {
-				Element nick = item.findChild("nick",
-						"http://jabber.org/protocol/nick");
-				if (nick != null) {
-					if (from != null) {
-						Contact contact = account.getRoster().getContact(
-								from);
-						contact.setPresenceName(nick.getContent());
-						mXmppConnectionService.getAvatarService().clear(account);
-						mXmppConnectionService.updateConversationUi();
-						mXmppConnectionService.updateAccountUi();
+			Message message;
+			if (body != null && body.startsWith("?OTR")) {
+				if (!isForwarded && !isTypeGroupChat && isProperlyAddressed) {
+					message = parseOtrChat(body, from, remoteMsgId, conversation);
+					if (message == null) {
+						return;
 					}
+				} else {
+					message = new Message(conversation, body, Message.ENCRYPTION_NONE, status);
 				}
+			} else if (encrypted != null) {
+				message = new Message(conversation, encrypted, Message.ENCRYPTION_PGP, status);
+			} else {
+				message = new Message(conversation, body, Message.ENCRYPTION_NONE, status);
 			}
-		}
-	}
-
-	private String getPgpBody(Element message) {
-		Element child = message.findChild("x", "jabber:x:encrypted");
-		if (child == null) {
-			return null;
-		} else {
-			return child.getContent();
-		}
-	}
-
-	private boolean isMarkable(Element message) {
-		return message.hasChild("markable", "urn:xmpp:chat-markers:0");
-	}
-
-	@Override
-	public void onMessagePacketReceived(Account account, MessagePacket packet) {
-		Message message = null;
-		this.parseNick(packet, account);
-		if ((packet.getType() == MessagePacket.TYPE_CHAT || packet.getType() == MessagePacket.TYPE_NORMAL)) {
-			if ((packet.getBody() != null)
-					&& (packet.getBody().startsWith("?OTR"))) {
-				message = this.parseOtrChat(packet, account);
-				if (message != null) {
-					message.markUnread();
+			message.setCounterpart(counterpart);
+			message.setRemoteMsgId(remoteMsgId);
+			message.setServerMsgId(serverMsgId);
+			message.setTime(timestamp);
+			message.markable = packet.hasChild("markable", "urn:xmpp:chat-markers:0");
+			if (conversation.getMode() == Conversation.MODE_MULTI) {
+				message.setTrueCounterpart(conversation.getMucOptions().getTrueCounterpart(counterpart.getResourcepart()));
+				if (!isTypeGroupChat) {
+					message.setType(Message.TYPE_PRIVATE);
 				}
-			} else if (packet.hasChild("body") && extractInvite(packet) == null) {
-				message = this.parseChat(packet, account);
-				if (message != null) {
+			}
+			updateLastseen(packet,account,true);
+			boolean checkForDuplicates = serverMsgId != null
+					|| (isTypeGroupChat && packet.hasChild("delay","urn:xmpp:delay"))
+					|| message.getType() == Message.TYPE_PRIVATE;
+			if (checkForDuplicates && conversation.hasDuplicateMessage(message)) {
+				Log.d(Config.LOGTAG,"skipping duplicate message from "+message.getCounterpart().toString()+" "+message.getBody());
+				return;
+			}
+			if (query != null) {
+				query.incrementMessageCount();
+			}
+			conversation.add(message);
+			if (serverMsgId == null) {
+				if (status == Message.STATUS_SEND || status == Message.STATUS_SEND_RECEIVED) {
+					mXmppConnectionService.markRead(conversation);
+					account.activateGracePeriod();
+				} else {
 					message.markUnread();
 				}
-			} else if (packet.hasChild("received", "urn:xmpp:carbons:2")
-					|| (packet.hasChild("sent", "urn:xmpp:carbons:2"))) {
-				message = this.parseCarbonMessage(packet, account);
-				if (message != null) {
-					if (message.getStatus() == Message.STATUS_SEND) {
-						account.activateGracePeriod();
-						mXmppConnectionService.markRead(message.getConversation());
-					} else {
-						message.markUnread();
-					}
+				mXmppConnectionService.updateConversationUi();
+			}
+
+			if (mXmppConnectionService.confirmMessages() && remoteMsgId != null && !isForwarded) {
+				if (packet.hasChild("markable", "urn:xmpp:chat-markers:0")) {
+					MessagePacket receipt = mXmppConnectionService
+							.getMessageGenerator().received(account, packet, "urn:xmpp:chat-markers:0");
+					mXmppConnectionService.sendMessagePacket(account, receipt);
 				}
-			} else if (packet.hasChild("result","urn:xmpp:mam:0")) {
-				message = parseMamMessage(packet, account);
-				if (message != null) {
-					Conversation conversation = message.getConversation();
-					conversation.add(message);
-					mXmppConnectionService.databaseBackend.createMessage(message);
+				if (packet.hasChild("request", "urn:xmpp:receipts")) {
+					MessagePacket receipt = mXmppConnectionService
+							.getMessageGenerator().received(account, packet, "urn:xmpp:receipts");
+					mXmppConnectionService.sendMessagePacket(account, receipt);
 				}
-				return;
-			} else if (packet.hasChild("fin","urn:xmpp:mam:0")) {
-				Element fin = packet.findChild("fin","urn:xmpp:mam:0");
-				mXmppConnectionService.getMessageArchiveService().processFin(fin);
-			} else {
-				parseNonMessage(packet, account);
 			}
-		} else if (packet.getType() == MessagePacket.TYPE_GROUPCHAT) {
-			message = this.parseGroupchat(packet, account);
-			if (message != null) {
-				if (message.getStatus() == Message.STATUS_RECEIVED) {
-					message.markUnread();
-				} else {
-					mXmppConnectionService.markRead(message.getConversation());
-					account.activateGracePeriod();
+			if (account.getXmppConnection() != null && account.getXmppConnection().getFeatures().advancedStreamFeaturesLoaded()) {
+				if (conversation.setLastMessageTransmitted(System.currentTimeMillis())) {
+					mXmppConnectionService.updateConversation(conversation);
 				}
 			}
-		} else if (packet.getType() == MessagePacket.TYPE_ERROR) {
-			this.parseError(packet, account);
-			return;
-		} else if (packet.getType() == MessagePacket.TYPE_HEADLINE) {
-			this.parseHeadline(packet, account);
-			return;
-		}
-		if ((message == null) || (message.getBody() == null)) {
-			return;
-		}
-		if ((Settings.CONFIRM_MESSAGE_RECEIVED)
-				&& ((packet.getId() != null))) {
-			if (packet.hasChild("markable", "urn:xmpp:chat-markers:0")) {
-				MessagePacket receipt = mXmppConnectionService
-						.getMessageGenerator().received(account, packet,
-								"urn:xmpp:chat-markers:0");
-				mXmppConnectionService.sendMessagePacket(account, receipt);
+
+			if (message.getStatus() == Message.STATUS_RECEIVED
+					&& conversation.getOtrSession() != null
+					&& !conversation.getOtrSession().getSessionID().getUserID()
+					.equals(message.getCounterpart().getResourcepart())) {
+				conversation.endOtrIfNeeded();
 			}
-			if (packet.hasChild("request", "urn:xmpp:receipts")) {
-				MessagePacket receipt = mXmppConnectionService
-						.getMessageGenerator().received(account, packet,
-								"urn:xmpp:receipts");
-				mXmppConnectionService.sendMessagePacket(account, receipt);
+
+			if (message.getEncryption() == Message.ENCRYPTION_NONE || mXmppConnectionService.saveEncryptedMessages()) {
+				mXmppConnectionService.databaseBackend.createMessage(message);
 			}
-		}
-		Conversation conversation = message.getConversation();
-		conversation.add(message);
-		if (account.getXmppConnection() != null && account.getXmppConnection().getFeatures().advancedStreamFeaturesLoaded()) {
-			if (conversation.setLastMessageTransmitted(System.currentTimeMillis())) {
-				mXmppConnectionService.updateConversation(conversation);
+			final HttpConnectionManager manager = this.mXmppConnectionService.getHttpConnectionManager();
+			if (message.trusted() && message.treatAsDownloadable() != Message.Decision.NEVER && manager.getAutoAcceptFileSize() > 0) {
+				manager.createNewDownloadConnection(message);
+			} else if (!message.isRead()) {
+				mXmppConnectionService.getNotificationService().push(message);
 			}
-		}
+		} else { //no body
+			if (isTypeGroupChat) {
+				Conversation conversation = mXmppConnectionService.find(account, from.toBareJid());
+				if (packet.hasChild("subject")) {
+					if (conversation != null && conversation.getMode() == Conversation.MODE_MULTI) {
+						conversation.setHasMessagesLeftOnServer(conversation.countMessages() > 0);
+						conversation.getMucOptions().setSubject(packet.findChildContent("subject"));
+						mXmppConnectionService.updateConversationUi();
+						return;
+					}
+				}
 
-		if (message.getStatus() == Message.STATUS_RECEIVED
-				&& conversation.getOtrSession() != null
-				&& !conversation.getOtrSession().getSessionID().getUserID()
-				.equals(message.getCounterpart().getResourcepart())) {
-			conversation.endOtrIfNeeded();
+				if (conversation != null && isMucStatusMessage) {
+					for (Element child : mucUserElement.getChildren()) {
+						if (child.getName().equals("status")
+								&& MucOptions.STATUS_CODE_ROOM_CONFIG_CHANGED.equals(child.getAttribute("code"))) {
+							mXmppConnectionService.fetchConferenceConfiguration(conversation);
+						}
+					}
+				}
+			}
 		}
 
-		if (packet.getType() != MessagePacket.TYPE_ERROR) {
-			if (message.getEncryption() == Message.ENCRYPTION_NONE
-					|| mXmppConnectionService.saveEncryptedMessages()) {
-				mXmppConnectionService.databaseBackend.createMessage(message);
+		Element received = packet.findChild("received", "urn:xmpp:chat-markers:0");
+		if (received == null) {
+			received = packet.findChild("received", "urn:xmpp:receipts");
+		}
+		if (received != null && !packet.fromAccount(account)) {
+			mXmppConnectionService.markMessage(account, from.toBareJid(), received.getAttribute("id"), Message.STATUS_SEND_RECEIVED);
+		}
+		Element displayed = packet.findChild("displayed", "urn:xmpp:chat-markers:0");
+		if (displayed != null) {
+			if (packet.fromAccount(account)) {
+				Conversation conversation = mXmppConnectionService.find(account,counterpart.toBareJid());
+				if (conversation != null) {
+					mXmppConnectionService.markRead(conversation);
+				}
+			} else {
+				updateLastseen(packet, account, true);
+				final Message displayedMessage = mXmppConnectionService.markMessage(account, from.toBareJid(), displayed.getAttribute("id"), Message.STATUS_SEND_DISPLAYED);
+				Message message = displayedMessage == null ? null : displayedMessage.prev();
+				while (message != null
+						&& message.getStatus() == Message.STATUS_SEND_RECEIVED
+						&& message.getTimeSent() < displayedMessage.getTimeSent()) {
+					mXmppConnectionService.markMessage(message, Message.STATUS_SEND_DISPLAYED);
+					message = message.prev();
+				}
 			}
 		}
-		final HttpConnectionManager manager = this.mXmppConnectionService.getHttpConnectionManager();
-		if (message.trusted()
-                && Settings.DOWNLOAD_IMAGE_LINKS
-                && mXmppConnectionService.isDownloadAllowedInConnection()
-                && message.bodyContainsDownloadable()
-                && manager.getAutoAcceptFileSize() > 0) {
-			manager.createNewConnection(message);
-		} else if (!message.isRead()) {
-			mXmppConnectionService.getNotificationService().push(message);
-		}
-		mXmppConnectionService.updateConversationUi();
-	}
 
-	private void parseHeadline(MessagePacket packet, Account account) {
-		if (packet.hasChild("event", "http://jabber.org/protocol/pubsub#event")) {
-			Element event = packet.findChild("event",
-					"http://jabber.org/protocol/pubsub#event");
-			parseEvent(event, packet.getFrom(), account);
+		Element event = packet.findChild("event", "http://jabber.org/protocol/pubsub#event");
+		if (event != null) {
+			parseEvent(event, from, account);
 		}
-	}
 
-	private void parseNick(MessagePacket packet, Account account) {
-		Element nick = packet.findChild("nick",
-				"http://jabber.org/protocol/nick");
+		String nick = packet.findChildContent("nick", "http://jabber.org/protocol/nick");
 		if (nick != null) {
-			if (packet.getFrom() != null) {
-				Contact contact = account.getRoster().getContact(
-						packet.getFrom());
-				contact.setPresenceName(nick.getContent());
-			}
+			Contact contact = account.getRoster().getContact(from);
+			contact.setPresenceName(nick);
 		}
 	}
 }
diff --git a/src/main/java/eu/siacs/conversations/parser/PresenceParser.java b/src/main/java/eu/siacs/conversations/parser/PresenceParser.java
index 7505b091..d83347d8 100644
--- a/src/main/java/eu/siacs/conversations/parser/PresenceParser.java
+++ b/src/main/java/eu/siacs/conversations/parser/PresenceParser.java
@@ -13,6 +13,7 @@ import eu.siacs.conversations.services.XmppConnectionService;
 import eu.siacs.conversations.xml.Element;
 import eu.siacs.conversations.xmpp.OnPresencePacketReceived;
 import eu.siacs.conversations.xmpp.jid.Jid;
+import eu.siacs.conversations.xmpp.pep.Avatar;
 import eu.siacs.conversations.xmpp.stanzas.PresencePacket;
 
 public class PresenceParser extends AbstractParser implements
@@ -44,38 +45,37 @@ public class PresenceParser extends AbstractParser implements
 	}
 
 	public void parseContactPresence(PresencePacket packet, Account account) {
-		PresenceGenerator mPresenceGenerator = mXmppConnectionService
-				.getPresenceGenerator();
-		if (packet.getFrom() == null) {
+		PresenceGenerator mPresenceGenerator = mXmppConnectionService.getPresenceGenerator();
+		final Jid from = packet.getFrom();
+		if (from == null) {
 			return;
 		}
-		final Jid from = packet.getFrom();
-		String type = packet.getAttribute("type");
-		Contact contact = account.getRoster().getContact(packet.getFrom());
+		final String type = packet.getAttribute("type");
+		final Contact contact = account.getRoster().getContact(from);
 		if (type == null) {
-			String presence;
-			if (!from.isBareJid()) {
-				presence = from.getResourcepart();
-			} else {
-				presence = "";
+			String presence = from.isBareJid() ? "" : from.getResourcepart();
+			contact.setPresenceName(packet.findChildContent("nick", "http://jabber.org/protocol/nick"));
+			Avatar avatar = Avatar.parsePresence(packet.findChild("x", "vcard-temp:x:update"));
+			if (avatar != null && !contact.isSelf()) {
+				avatar.owner = from.toBareJid();
+				if (mXmppConnectionService.getFileBackend().isAvatarCached(avatar)) {
+					if (contact.setAvatar(avatar)) {
+						mXmppConnectionService.getAvatarService().clear(contact);
+						mXmppConnectionService.updateConversationUi();
+						mXmppConnectionService.updateRosterUi();
+					}
+				} else {
+					mXmppConnectionService.fetchAvatar(account, avatar);
+				}
 			}
 			int sizeBefore = contact.getPresences().size();
-			contact.updatePresence(presence,
-					Presences.parseShow(packet.findChild("show")));
+			contact.updatePresence(presence, Presences.parseShow(packet.findChild("show")));
 			PgpEngine pgp = mXmppConnectionService.getPgpEngine();
-			if (pgp != null) {
-				Element x = packet.findChild("x", "jabber:x:signed");
-				if (x != null) {
-					Element status = packet.findChild("status");
-					String msg;
-					if (status != null) {
-						msg = status.getContent();
-					} else {
-						msg = "";
-					}
-					contact.setPgpKeyId(pgp.fetchKeyId(account, msg,
-							x.getContent()));
-				}
+			Element x = packet.findChild("x", "jabber:x:signed");
+			if (pgp != null && x != null) {
+				Element status = packet.findChild("status");
+				String msg = status != null ? status.getContent() : "";
+				contact.setPgpKeyId(pgp.fetchKeyId(account, msg, x.getContent()));
 			}
 			boolean online = sizeBefore < contact.getPresences().size();
 			updateLastseen(packet, account, false);
@@ -86,8 +86,7 @@ public class PresenceParser extends AbstractParser implements
 			} else {
 				contact.removePresence(from.getResourcepart());
 			}
-			mXmppConnectionService.onContactStatusChanged
-					.onContactStatusChanged(contact, false);
+			mXmppConnectionService.onContactStatusChanged.onContactStatusChanged(contact, false);
 		} else if (type.equals("subscribe")) {
 			if (contact.getOption(Contact.Options.PREEMPTIVE_GRANT)) {
 				mXmppConnectionService.sendPresencePacket(account,
@@ -96,11 +95,6 @@ public class PresenceParser extends AbstractParser implements
 				contact.setOption(Contact.Options.PENDING_SUBSCRIPTION_REQUEST);
 			}
 		}
-		Element nick = packet.findChild("nick",
-				"http://jabber.org/protocol/nick");
-		if (nick != null) {
-			contact.setPresenceName(nick.getContent());
-		}
 		mXmppConnectionService.updateRosterUi();
 	}
 
diff --git a/src/main/java/eu/siacs/conversations/persistance/DatabaseBackend.java b/src/main/java/eu/siacs/conversations/persistance/DatabaseBackend.java
index 28e1c47e..d11b02fa 100644
--- a/src/main/java/eu/siacs/conversations/persistance/DatabaseBackend.java
+++ b/src/main/java/eu/siacs/conversations/persistance/DatabaseBackend.java
@@ -4,11 +4,13 @@ import java.util.ArrayList;
 import java.util.List;
 import java.util.concurrent.CopyOnWriteArrayList;
 
+import eu.siacs.conversations.Config;
 import eu.siacs.conversations.entities.Account;
 import eu.siacs.conversations.entities.Contact;
 import eu.siacs.conversations.entities.Conversation;
 import eu.siacs.conversations.entities.Message;
 import eu.siacs.conversations.entities.Roster;
+import eu.siacs.conversations.xmpp.jid.InvalidJidException;
 import eu.siacs.conversations.xmpp.jid.Jid;
 
 import android.content.Context;
@@ -16,13 +18,14 @@ import android.database.Cursor;
 import android.database.sqlite.SQLiteCantOpenDatabaseException;
 import android.database.sqlite.SQLiteDatabase;
 import android.database.sqlite.SQLiteOpenHelper;
+import android.util.Log;
 
 public class DatabaseBackend extends SQLiteOpenHelper {
 
 	private static DatabaseBackend instance = null;
 
 	private static final String DATABASE_NAME = "history";
-	private static final int DATABASE_VERSION = 13;
+	private static final int DATABASE_VERSION = 14;
 
 	private static String CREATE_CONTATCS_STATEMENT = "create table "
 			+ Contact.TABLENAME + "(" + Contact.ACCOUNT + " TEXT, "
@@ -130,6 +133,88 @@ public class DatabaseBackend extends SQLiteOpenHelper {
 			db.execSQL("delete from "+Contact.TABLENAME);
 			db.execSQL("update "+Account.TABLENAME+" set "+Account.ROSTERVERSION+" = NULL");
 		}
+		if (oldVersion < 14 && newVersion >= 14) {
+			// migrate db to new, canonicalized JID domainpart representation
+
+			// Conversation table
+			Cursor cursor = db.rawQuery("select * from " + Conversation.TABLENAME, new String[0]);
+			while(cursor.moveToNext()) {
+				String newJid;
+				try {
+					newJid = Jid.fromString(
+							cursor.getString(cursor.getColumnIndex(Conversation.CONTACTJID))
+					).toString();
+				} catch (InvalidJidException ignored) {
+					Log.e(Config.LOGTAG, "Failed to migrate Conversation CONTACTJID "
+							+cursor.getString(cursor.getColumnIndex(Conversation.CONTACTJID))
+							+": " + ignored +". Skipping...");
+					continue;
+				}
+
+				String updateArgs[] = {
+						newJid,
+						cursor.getString(cursor.getColumnIndex(Conversation.UUID)),
+				};
+				db.execSQL("update " + Conversation.TABLENAME
+						+ " set " + Conversation.CONTACTJID	+ " = ? "
+						+ " where " + Conversation.UUID + " = ?", updateArgs);
+			}
+			cursor.close();
+
+			// Contact table
+			cursor = db.rawQuery("select * from " + Contact.TABLENAME, new String[0]);
+			while(cursor.moveToNext()) {
+				String newJid;
+				try {
+					newJid = Jid.fromString(
+							cursor.getString(cursor.getColumnIndex(Contact.JID))
+					).toString();
+				} catch (InvalidJidException ignored) {
+					Log.e(Config.LOGTAG, "Failed to migrate Contact JID "
+							+cursor.getString(cursor.getColumnIndex(Contact.JID))
+							+": " + ignored +". Skipping...");
+					continue;
+				}
+
+				String updateArgs[] = {
+						newJid,
+						cursor.getString(cursor.getColumnIndex(Contact.ACCOUNT)),
+						cursor.getString(cursor.getColumnIndex(Contact.JID)),
+				};
+				db.execSQL("update " + Contact.TABLENAME
+						+ " set " + Contact.JID + " = ? "
+						+ " where " + Contact.ACCOUNT + " = ? "
+						+ " AND " + Contact.JID + " = ?", updateArgs);
+			}
+			cursor.close();
+
+			// Account table
+			cursor = db.rawQuery("select * from " + Account.TABLENAME, new String[0]);
+			while(cursor.moveToNext()) {
+				String newServer;
+				try {
+					newServer = Jid.fromParts(
+							cursor.getString(cursor.getColumnIndex(Account.USERNAME)),
+							cursor.getString(cursor.getColumnIndex(Account.SERVER)),
+							"mobile"
+					).getDomainpart();
+				} catch (InvalidJidException ignored) {
+					Log.e(Config.LOGTAG, "Failed to migrate Account SERVER "
+							+cursor.getString(cursor.getColumnIndex(Account.SERVER))
+							+": " + ignored +". Skipping...");
+					continue;
+				}
+
+				String updateArgs[] = {
+						newServer,
+						cursor.getString(cursor.getColumnIndex(Account.UUID)),
+				};
+				db.execSQL("update " + Account.TABLENAME
+						+ " set " + Account.SERVER + " = ? "
+						+ " where " + Account.UUID + " = ?", updateArgs);
+			}
+			cursor.close();
+		}
 	}
 
 	public static synchronized DatabaseBackend getInstance(Context context) {
@@ -301,8 +386,7 @@ public class DatabaseBackend extends SQLiteOpenHelper {
 		SQLiteDatabase db = this.getReadableDatabase();
 		Cursor cursor;
 		String args[] = { roster.getAccount().getUuid() };
-		cursor = db.query(Contact.TABLENAME, null, Contact.ACCOUNT + "=?",
-				args, null, null, null);
+		cursor = db.query(Contact.TABLENAME, null, Contact.ACCOUNT + "=?", args, null, null, null);
 		while (cursor.moveToNext()) {
 			roster.initContact(Contact.fromCursor(cursor));
 		}
diff --git a/src/main/java/eu/siacs/conversations/persistance/FileBackend.java b/src/main/java/eu/siacs/conversations/persistance/FileBackend.java
index c499d499..ab191285 100644
--- a/src/main/java/eu/siacs/conversations/persistance/FileBackend.java
+++ b/src/main/java/eu/siacs/conversations/persistance/FileBackend.java
@@ -1,6 +1,7 @@
 package eu.siacs.conversations.persistance;
 
 import java.io.ByteArrayOutputStream;
+import java.io.Closeable;
 import java.io.File;
 import java.io.FileNotFoundException;
 import java.io.FileOutputStream;
@@ -12,6 +13,7 @@ import java.security.DigestOutputStream;
 import java.security.MessageDigest;
 import java.security.NoSuchAlgorithmException;
 import java.text.SimpleDateFormat;
+import java.util.Arrays;
 import java.util.Date;
 import java.util.Locale;
 
@@ -31,6 +33,7 @@ import android.webkit.MimeTypeMap;
 
 import eu.siacs.conversations.Config;
 import eu.siacs.conversations.R;
+import eu.siacs.conversations.entities.Transferable;
 import eu.siacs.conversations.entities.DownloadableFile;
 import eu.siacs.conversations.entities.Message;
 import eu.siacs.conversations.services.XmppConnectionService;
@@ -42,8 +45,7 @@ public class FileBackend {
 
 	private static int IMAGE_SIZE = 1920;
 
-	private SimpleDateFormat imageDateFormat = new SimpleDateFormat(
-			"yyyyMMdd_HHmmssSSS", Locale.US);
+	private final SimpleDateFormat imageDateFormat = new SimpleDateFormat("yyyyMMdd_HHmmssSSS", Locale.US);
 
 	private XmppConnectionService mXmppConnectionService;
 
@@ -78,10 +80,10 @@ public class FileBackend {
 			if (path.startsWith("/")) {
 				return new DownloadableFile(path);
 			} else {
-				if (message.getType() == Message.TYPE_FILE) {
+				if (Arrays.asList(Transferable.VALID_IMAGE_EXTENSIONS).contains(extension)) {
 					return new DownloadableFile(getConversationsFileDirectory() + path);
 				} else {
-					return new DownloadableFile(getConversationsImageDirectory()+path);
+					return new DownloadableFile(getConversationsImageDirectory() + path);
 				}
 			}
 		}
@@ -110,9 +112,7 @@ public class FileBackend {
 				scalledW = size;
 				scalledH = (int) (h / ((double) w / size));
 			}
-			Bitmap scalledBitmap = Bitmap.createScaledBitmap(originalBitmap,
-					scalledW, scalledH, true);
-			return scalledBitmap;
+			return Bitmap.createScaledBitmap(originalBitmap, scalledW, scalledH, true);
 		} else {
 			return originalBitmap;
 		}
@@ -148,31 +148,35 @@ public class FileBackend {
 	}
 
 	public DownloadableFile copyFileToPrivateStorage(Message message, Uri uri) throws FileCopyException {
+		Log.d(Config.LOGTAG, "copy " + uri.toString() + " to private storage");
+		String mime = mXmppConnectionService.getContentResolver().getType(uri);
+		String extension = MimeTypeMap.getSingleton().getExtensionFromMimeType(mime);
+		message.setRelativeFilePath(message.getUuid() + "." + extension);
+		DownloadableFile file = mXmppConnectionService.getFileBackend().getFile(message);
+		file.getParentFile().mkdirs();
+		OutputStream os = null;
+		InputStream is = null;
 		try {
-			Log.d(Config.LOGTAG, "copy " + uri.toString() + " to private storage");
-			String mime = mXmppConnectionService.getContentResolver().getType(uri);
-			String extension = MimeTypeMap.getSingleton().getExtensionFromMimeType(mime);
-			message.setRelativeFilePath(message.getUuid() + "." + extension);
-			DownloadableFile file = mXmppConnectionService.getFileBackend().getFile(message);
-			file.getParentFile().mkdirs();
 			file.createNewFile();
-			OutputStream os = new FileOutputStream(file);
-			InputStream is = mXmppConnectionService.getContentResolver().openInputStream(uri);
+			os = new FileOutputStream(file);
+			is = mXmppConnectionService.getContentResolver().openInputStream(uri);
 			byte[] buffer = new byte[1024];
-            int length;
-            while ((length = is.read(buffer)) > 0) {
+			int length;
+			while ((length = is.read(buffer)) > 0) {
 				os.write(buffer, 0, length);
-            }
+			}
 			os.flush();
-			os.close();
-			is.close();
-			Log.d(Config.LOGTAG, "output file name " + mXmppConnectionService.getFileBackend().getFile(message));
-			return file;
-		} catch (FileNotFoundException e) {
+		} catch(FileNotFoundException e) {
 			throw new FileCopyException(R.string.error_file_not_found);
 		} catch (IOException e) {
+			e.printStackTrace();
 			throw new FileCopyException(R.string.error_io_exception);
+		} finally {
+			close(os);
+			close(is);
 		}
+		Log.d(Config.LOGTAG, "output file name " + mXmppConnectionService.getFileBackend().getFile(message));
+		return file;
 	}
 
 	public DownloadableFile copyImageToPrivateStorage(Message message, Uri image)
@@ -182,49 +186,48 @@ public class FileBackend {
 
 	private DownloadableFile copyImageToPrivateStorage(Message message,
 			Uri image, int sampleSize) throws FileCopyException {
+		DownloadableFile file = getFile(message);
+		file.getParentFile().mkdirs();
+		InputStream is = null;
+		OutputStream os = null;
 		try {
-			InputStream is = mXmppConnectionService.getContentResolver()
-					.openInputStream(image);
-			DownloadableFile file = getFile(message);
-			file.getParentFile().mkdirs();
 			file.createNewFile();
+			is = mXmppConnectionService.getContentResolver().openInputStream(image);
+			os = new FileOutputStream(file);
+
 			Bitmap originalBitmap;
 			BitmapFactory.Options options = new BitmapFactory.Options();
 			int inSampleSize = (int) Math.pow(2, sampleSize);
-			Log.d(Config.LOGTAG, "reading bitmap with sample size "
-					+ inSampleSize);
+			Log.d(Config.LOGTAG, "reading bitmap with sample size " + inSampleSize);
 			options.inSampleSize = inSampleSize;
 			originalBitmap = BitmapFactory.decodeStream(is, null, options);
 			is.close();
 			if (originalBitmap == null) {
 				throw new FileCopyException(R.string.error_not_an_image_file);
 			}
-			Bitmap scalledBitmap = resize(originalBitmap, IMAGE_SIZE);
-			originalBitmap = null;
+			Bitmap scaledBitmap = resize(originalBitmap, IMAGE_SIZE);
 			int rotation = getRotation(image);
 			if (rotation > 0) {
-				scalledBitmap = rotate(scalledBitmap, rotation);
+				scaledBitmap = rotate(scaledBitmap, rotation);
 			}
-			OutputStream os = new FileOutputStream(file);
-			boolean success = scalledBitmap.compress(
-					Bitmap.CompressFormat.WEBP, 75, os);
+
+			boolean success = scaledBitmap.compress(Bitmap.CompressFormat.WEBP, 75, os);
 			if (!success) {
 				throw new FileCopyException(R.string.error_compressing_image);
 			}
 			os.flush();
-			os.close();
 			long size = file.getSize();
-			int width = scalledBitmap.getWidth();
-			int height = scalledBitmap.getHeight();
-			message.setBody(Long.toString(size) + ',' + width + ',' + height);
+			int width = scaledBitmap.getWidth();
+			int height = scaledBitmap.getHeight();
+			message.setBody(Long.toString(size) + '|' + width + '|' + height);
 			return file;
 		} catch (FileNotFoundException e) {
 			throw new FileCopyException(R.string.error_file_not_found);
 		} catch (IOException e) {
+			e.printStackTrace();
 			throw new FileCopyException(R.string.error_io_exception);
 		} catch (SecurityException e) {
-			throw new FileCopyException(
-					R.string.error_security_exception_during_image_copy);
+			throw new FileCopyException(R.string.error_security_exception_during_image_copy);
 		} catch (OutOfMemoryError e) {
 			++sampleSize;
 			if (sampleSize <= 3) {
@@ -232,23 +235,26 @@ public class FileBackend {
 			} else {
 				throw new FileCopyException(R.string.error_out_of_memory);
 			}
+		} catch (NullPointerException e) {
+			throw new FileCopyException(R.string.error_io_exception);
+		} finally {
+			close(os);
+			close(is);
 		}
 	}
 
 	private int getRotation(Uri image) {
+		InputStream is = null;
 		try {
-			InputStream is = mXmppConnectionService.getContentResolver()
-					.openInputStream(image);
+			is = mXmppConnectionService.getContentResolver().openInputStream(image);
 			return ExifHelper.getOrientation(is);
 		} catch (FileNotFoundException e) {
 			return 0;
+		} finally {
+			close(is);
 		}
 	}
 
-	public Bitmap getImageFromMessage(Message message) {
-		return BitmapFactory.decodeFile(getFile(message).getAbsolutePath());
-	}
-
 	public Bitmap getThumbnail(Message message, int size, boolean cacheOnly)
 			throws FileNotFoundException {
 		Bitmap thumbnail = mXmppConnectionService.getBitmapCache().get(
@@ -257,8 +263,7 @@ public class FileBackend {
 			File file = getFile(message);
 			BitmapFactory.Options options = new BitmapFactory.Options();
 			options.inSampleSize = calcSampleSize(file, size);
-			Bitmap fullsize = BitmapFactory.decodeFile(file.getAbsolutePath(),
-					options);
+			Bitmap fullsize = BitmapFactory.decodeFile(file.getAbsolutePath(),options);
 			if (fullsize == null) {
 				throw new FileNotFoundException();
 			}
@@ -271,13 +276,11 @@ public class FileBackend {
 
 	public Uri getTakePhotoUri() {
 		StringBuilder pathBuilder = new StringBuilder();
-		pathBuilder.append(Environment
-				.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM));
+		pathBuilder.append(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM));
 		pathBuilder.append('/');
 		pathBuilder.append("Camera");
 		pathBuilder.append('/');
-		pathBuilder.append("IMG_" + this.imageDateFormat.format(new Date())
-				+ ".jpg");
+		pathBuilder.append("IMG_" + this.imageDateFormat.format(new Date()) + ".jpg");
 		Uri uri = Uri.parse("file://" + pathBuilder.toString());
 		File file = new File(uri.toString());
 		file.getParentFile().mkdirs();
@@ -325,13 +328,13 @@ public class FileBackend {
 			String filename = getAvatarPath(avatar.getFilename());
 			file = new File(filename + ".tmp");
 			file.getParentFile().mkdirs();
+			OutputStream os = null;
 			try {
 				file.createNewFile();
-				FileOutputStream mFileOutputStream = new FileOutputStream(file);
+				os = new FileOutputStream(file);
 				MessageDigest digest = MessageDigest.getInstance("SHA-1");
 				digest.reset();
-				DigestOutputStream mDigestOutputStream = new DigestOutputStream(
-						mFileOutputStream, digest);
+				DigestOutputStream mDigestOutputStream = new DigestOutputStream(os, digest);
 				mDigestOutputStream.write(avatar.getImageAsBytes());
 				mDigestOutputStream.flush();
 				mDigestOutputStream.close();
@@ -349,6 +352,8 @@ public class FileBackend {
 				return false;
 			} catch (NoSuchAlgorithmException e) {
 				return false;
+			} finally {
+				close(os);
 			}
 		}
 		avatar.size = file.length();
@@ -356,8 +361,7 @@ public class FileBackend {
 	}
 
 	public String getAvatarPath(String avatar) {
-		return mXmppConnectionService.getFilesDir().getAbsolutePath()
-				+ "/avatars/" + avatar;
+		return mXmppConnectionService.getFilesDir().getAbsolutePath()+ "/avatars/" + avatar;
 	}
 
 	public Uri getAvatarUri(String avatar) {
@@ -368,10 +372,11 @@ public class FileBackend {
 		if (image == null) {
 			return null;
 		}
+		InputStream is = null;
 		try {
 			BitmapFactory.Options options = new BitmapFactory.Options();
 			options.inSampleSize = calcSampleSize(image, size);
-			InputStream is = mXmppConnectionService.getContentResolver().openInputStream(image);
+			is = mXmppConnectionService.getContentResolver().openInputStream(image);
 			Bitmap input = BitmapFactory.decodeStream(is, null, options);
 			if (input == null) {
 				return null;
@@ -384,6 +389,8 @@ public class FileBackend {
 			}
 		} catch (FileNotFoundException e) {
 			return null;
+		} finally {
+			close(is);
 		}
 	}
 
@@ -391,12 +398,15 @@ public class FileBackend {
 		if (image == null) {
 			return null;
 		}
+		InputStream is = null;
 		try {
 			BitmapFactory.Options options = new BitmapFactory.Options();
 			options.inSampleSize = calcSampleSize(image,Math.max(newHeight, newWidth));
-			InputStream is = mXmppConnectionService.getContentResolver().openInputStream(image);
+			is = mXmppConnectionService.getContentResolver().openInputStream(image);
 			Bitmap source = BitmapFactory.decodeStream(is, null, options);
-
+			if (source == null) {
+				return null;
+			}
 			int sourceWidth = source.getWidth();
 			int sourceHeight = source.getHeight();
 			float xScale = (float) newWidth / sourceWidth;
@@ -408,14 +418,15 @@ public class FileBackend {
 			float top = (newHeight - scaledHeight) / 2;
 
 			RectF targetRect = new RectF(left, top, left + scaledWidth, top + scaledHeight);
-			Bitmap dest = Bitmap.createBitmap(newWidth, newHeight, source.getConfig());
+			Bitmap dest = Bitmap.createBitmap(newWidth, newHeight, Bitmap.Config.ARGB_8888);
 			Canvas canvas = new Canvas(dest);
 			canvas.drawBitmap(source, null, targetRect, null);
 			return dest;
 		} catch (FileNotFoundException e) {
 			return null;
+		} finally {
+			close(is);
 		}
-
 	}
 
 	public Bitmap cropCenterSquare(Bitmap input, int size) {
@@ -430,7 +441,7 @@ public class FileBackend {
 		float top = (size - outHeight) / 2;
 		RectF target = new RectF(left, top, left + outWidth, top + outHeight);
 
-		Bitmap output = Bitmap.createBitmap(size, size, input.getConfig());
+		Bitmap output = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
 		Canvas canvas = new Canvas(output);
 		canvas.drawBitmap(input, null, target, null);
 		return output;
@@ -490,7 +501,11 @@ public class FileBackend {
 				message.setBody(url.toString()+"|"+Long.toString(file.getSize()) + '|' + imageWidth + '|' + imageHeight);
 			}
 		} else {
-			message.setBody(Long.toString(file.getSize()));
+			if (url != null) {
+				message.setBody(url.toString()+"|"+Long.toString(file.getSize()));
+			} else {
+				message.setBody(Long.toString(file.getSize()));
+			}
 		}
 
 	}
@@ -522,4 +537,13 @@ public class FileBackend {
 	public boolean isFileAvailable(Message message) {
 		return getFile(message).exists();
 	}
+
+	public static void close(Closeable stream) {
+		if (stream != null) {
+			try {
+				stream.close();
+			} catch (IOException e) {
+			}
+		}
+	}
 }
diff --git a/src/main/java/eu/siacs/conversations/services/MessageArchiveService.java b/src/main/java/eu/siacs/conversations/services/MessageArchiveService.java
index f97077c4..0bc428c8 100644
--- a/src/main/java/eu/siacs/conversations/services/MessageArchiveService.java
+++ b/src/main/java/eu/siacs/conversations/services/MessageArchiveService.java
@@ -166,12 +166,12 @@ public class MessageArchiveService implements OnAdvancedStreamFeaturesLoaded {
 		}
 	}
 
-	public void processFin(Element fin) {
+	public void processFin(Element fin, Jid from) {
 		if (fin == null) {
 			return;
 		}
 		Query query = findQuery(fin.getAttribute("queryid"));
-		if (query == null) {
+		if (query == null || !query.validFrom(from)) {
 			return;
 		}
 		boolean complete = fin.getAttributeAsBoolean("complete");
@@ -336,6 +336,14 @@ public class MessageArchiveService implements OnAdvancedStreamFeaturesLoaded {
 			return this.messageCount;
 		}
 
+		public boolean validFrom(Jid from) {
+			if (muc()) {
+				return getWith().equals(from);
+			} else {
+				return (from == null) || account.getJid().toBareJid().equals(from.toBareJid());
+			}
+		}
+
 		@Override
 		public String toString() {
 			StringBuilder builder = new StringBuilder();
diff --git a/src/main/java/eu/siacs/conversations/services/NotificationService.java b/src/main/java/eu/siacs/conversations/services/NotificationService.java
index 642021bf..09d223b3 100644
--- a/src/main/java/eu/siacs/conversations/services/NotificationService.java
+++ b/src/main/java/eu/siacs/conversations/services/NotificationService.java
@@ -18,7 +18,6 @@ import android.support.v4.app.NotificationCompat.Builder;
 import android.support.v4.app.TaskStackBuilder;
 import android.text.Html;
 import android.util.DisplayMetrics;
-import android.util.Log;
 
 import org.json.JSONArray;
 import org.json.JSONObject;
@@ -43,7 +42,6 @@ import eu.siacs.conversations.ui.ManageAccountActivity;
 import eu.siacs.conversations.ui.TimePreference;
 import eu.siacs.conversations.utils.GeoHelper;
 import eu.siacs.conversations.utils.UIHelper;
-import eu.siacs.conversations.xmpp.XmppConnection;
 
 public class NotificationService {
 
@@ -86,7 +84,11 @@ public class NotificationService {
 		i.putExtra("messageType", "PEBBLE_ALERT");
 		i.putExtra("sender", "Conversations"); /* XXX: Shouldn't be hardcoded, e.g., AbstractGenerator.APP_NAME); */
 		i.putExtra("notificationData", notificationData);
-
+		// notify Pebble App
+		i.setPackage("com.getpebble.android");
+		mXmppConnectionService.sendBroadcast(i);
+		// notify Gadgetbridge
+		i.setPackage("nodomain.freeyourgadget.gadgetbridge");
 		mXmppConnectionService.sendBroadcast(i);
 	}
 
@@ -131,6 +133,7 @@ public class NotificationService {
 	}
 
 	public void push(final Message message) {
+		mXmppConnectionService.updateUnreadCountBadge();
 		if (!notify(message)) {
 			return;
 		}
@@ -176,7 +179,7 @@ public class NotificationService {
 	}
 
 	private void setNotificationColor(final Builder mBuilder) {
-		mBuilder.setColor(mXmppConnectionService.getResources().getColor(R.color.primary));
+		mBuilder.setColor(mXmppConnectionService.getResources().getColor(R.color.green500));
 	}
 
 	private void updateNotification(final boolean notify) {
@@ -299,7 +302,7 @@ public class NotificationService {
 			final ArrayList<Message> tmp = new ArrayList<>();
 			for (final Message msg : messages) {
 				if (msg.getType() == Message.TYPE_TEXT
-						&& msg.getDownloadable() == null) {
+						&& msg.getTransferable() == null) {
 					tmp.add(msg);
 						}
 			}
@@ -331,7 +334,7 @@ public class NotificationService {
 	private Message getImage(final Iterable<Message> messages) {
 		for (final Message message : messages) {
 			if (message.getType() == Message.TYPE_IMAGE
-					&& message.getDownloadable() == null
+					&& message.getTransferable() == null
 					&& message.getEncryption() != Message.ENCRYPTION_PGP) {
 				return message;
 					}
@@ -342,7 +345,7 @@ public class NotificationService {
 	private Message getFirstDownloadableMessage(final Iterable<Message> messages) {
 		for (final Message message : messages) {
 			if ((message.getType() == Message.TYPE_FILE || message.getType() == Message.TYPE_IMAGE) &&
-					message.getDownloadable() != null) {
+					message.getTransferable() != null) {
 				return message;
 			}
 		}
@@ -455,7 +458,7 @@ public class NotificationService {
 		// nick (matched in case-insensitive manner), followed by optional
 		// punctuation (for example "bob: i disagree" or "how are you alice?"),
 		// followed by another word boundary.
-		return Pattern.compile("\\b" + nick + "\\p{Punct}?\\b",
+		return Pattern.compile("\\b" + Pattern.quote(nick) + "\\p{Punct}?\\b",
 				Pattern.CASE_INSENSITIVE | Pattern.UNICODE_CASE);
 	}
 
@@ -494,7 +497,7 @@ public class NotificationService {
 		final int cancelIcon;
 		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
 			mBuilder.setCategory(Notification.CATEGORY_SERVICE);
-			mBuilder.setSmallIcon(R.drawable.ic_import_export_white_48dp);
+			mBuilder.setSmallIcon(R.drawable.ic_import_export_white_24dp);
 			cancelIcon = R.drawable.ic_cancel_white_24dp;
 		} else {
 			mBuilder.setSmallIcon(R.drawable.ic_stat_communication_import_export);
@@ -541,7 +544,7 @@ public class NotificationService {
 		mBuilder.setOngoing(true);
 		//mBuilder.setLights(0xffffffff, 2000, 4000);
 		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
-			mBuilder.setSmallIcon(R.drawable.ic_warning_white_36dp);
+			mBuilder.setSmallIcon(R.drawable.ic_warning_white_24dp);
 		} else {
 			mBuilder.setSmallIcon(R.drawable.ic_stat_alert_warning);
 		}
diff --git a/src/main/java/eu/siacs/conversations/services/XmppConnectionService.java b/src/main/java/eu/siacs/conversations/services/XmppConnectionService.java
index fc670efd..27bc502a 100644
--- a/src/main/java/eu/siacs/conversations/services/XmppConnectionService.java
+++ b/src/main/java/eu/siacs/conversations/services/XmppConnectionService.java
@@ -28,6 +28,7 @@ import android.util.LruCache;
 import net.java.otr4j.OtrException;
 import net.java.otr4j.session.Session;
 import net.java.otr4j.session.SessionID;
+import net.java.otr4j.session.SessionImpl;
 import net.java.otr4j.session.SessionStatus;
 
 import org.openintents.openpgp.util.OpenPgpApi;
@@ -36,10 +37,12 @@ import org.openintents.openpgp.util.OpenPgpServiceConnection;
 import java.math.BigInteger;
 import java.security.SecureRandom;
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.Comparator;
 import java.util.Hashtable;
+import java.util.Iterator;
 import java.util.List;
 import java.util.Locale;
 import java.util.Map;
@@ -55,12 +58,11 @@ import eu.siacs.conversations.entities.Blockable;
 import eu.siacs.conversations.entities.Bookmark;
 import eu.siacs.conversations.entities.Contact;
 import eu.siacs.conversations.entities.Conversation;
-import eu.siacs.conversations.entities.Downloadable;
-import eu.siacs.conversations.entities.DownloadablePlaceholder;
+import eu.siacs.conversations.entities.Transferable;
+import eu.siacs.conversations.entities.TransferablePlaceholder;
 import eu.siacs.conversations.entities.Message;
 import eu.siacs.conversations.entities.MucOptions;
 import eu.siacs.conversations.entities.MucOptions.OnRenameListener;
-import eu.siacs.conversations.entities.Presences;
 import eu.siacs.conversations.generator.IqGenerator;
 import eu.siacs.conversations.generator.MessageGenerator;
 import eu.siacs.conversations.generator.PresenceGenerator;
@@ -76,6 +78,7 @@ import eu.siacs.conversations.utils.ExceptionHelper;
 import eu.siacs.conversations.utils.OnPhoneContactsLoadedListener;
 import eu.siacs.conversations.utils.PRNGFixes;
 import eu.siacs.conversations.utils.PhoneHelper;
+import eu.siacs.conversations.utils.SerialSingleThreadExecutor;
 import eu.siacs.conversations.utils.Xmlns;
 import eu.siacs.conversations.xml.Element;
 import eu.siacs.conversations.xmpp.OnBindListener;
@@ -99,6 +102,7 @@ import eu.siacs.conversations.xmpp.pep.Avatar;
 import eu.siacs.conversations.xmpp.stanzas.IqPacket;
 import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
 import eu.siacs.conversations.xmpp.stanzas.PresencePacket;
+import me.leolin.shortcutbadger.ShortcutBadger;
 
 public class XmppConnectionService extends Service implements OnPhoneContactsLoadedListener {
 
@@ -117,6 +121,10 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 			startService(intent);
 		}
 	};
+
+	private final SerialSingleThreadExecutor mFileAddingExecutor = new SerialSingleThreadExecutor();
+	private final SerialSingleThreadExecutor mDatabaseExecutor = new SerialSingleThreadExecutor();
+
 	private final IBinder mBinder = new XmppConnectionBinder();
 	private final List<Conversation> conversations = new CopyOnWriteArrayList<>();
 	private final FileObserver fileObserver = new FileObserver(
@@ -175,13 +183,22 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 		public void onContactStatusChanged(Contact contact, boolean online) {
 			Conversation conversation = find(getConversations(), contact);
 			if (conversation != null) {
-				if (online && contact.getPresences().size() > 1) {
+				if (online) {
 					conversation.endOtrIfNeeded();
+					if (contact.getPresences().size() == 1) {
+						sendUnsentMessages(conversation);
+					}
 				} else {
-					conversation.resetOtrSession();
-				}
-				if (online && (contact.getPresences().size() == 1)) {
-					sendUnsentMessages(conversation);
+					if (contact.getPresences().size() >= 1) {
+						if (conversation.hasValidOtrSession()) {
+							String otrResource = conversation.getOtrSession().getSessionID().getUserID();
+							if (!(Arrays.asList(contact.getPresences().asStringArray()).contains(otrResource))) {
+								conversation.endOtrIfNeeded();
+							}
+						}
+					} else {
+						conversation.endOtrIfNeeded();
+					}
 				}
 			}
 		}
@@ -193,6 +210,18 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 	private OnMessagePacketReceived mMessageParser = new MessageParser(this);
 	private OnPresencePacketReceived mPresenceParser = new PresenceParser(this);
 	private IqParser mIqParser = new IqParser(this);
+	private OnIqPacketReceived mDefaultIqHandler = new OnIqPacketReceived() {
+		@Override
+		public void onIqPacketReceived(Account account, IqPacket packet) {
+			if (packet.getType() == IqPacket.TYPE.ERROR) {
+				Element error = packet.findChild("error");
+				String text = error != null ? error.findChildContent("text") : null;
+				if (text != null) {
+					Log.d(Config.LOGTAG,account.getJid().toBareJid()+": received iq error - "+text);
+				}
+			}
+		}
+	};
 	private MessageGenerator mMessageGenerator = new MessageGenerator(this);
 	private PresenceGenerator mPresenceGenerator = new PresenceGenerator(this);
 	private List<Account> accounts;
@@ -201,9 +230,13 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 	private HttpConnectionManager mHttpConnectionManager = new HttpConnectionManager(
 			this);
 	private AvatarService mAvatarService = new AvatarService(this);
+	private final List<String> mInProgressAvatarFetches = new ArrayList<>();
 	private MessageArchiveService mMessageArchiveService = new MessageArchiveService(this);
 	private OnConversationUpdate mOnConversationUpdate = null;
-	private Integer convChangedListenerCount = 0;
+	private int convChangedListenerCount = 0;
+	private OnShowErrorToast mOnShowErrorToast = null;
+	private int showErrorToastListenerCount = 0;
+	private int unreadCount = -1;
 	private OnAccountUpdate mOnAccountUpdate = null;
 	private OnStatusChanged statusListener = new OnStatusChanged() {
 
@@ -319,7 +352,7 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 			message.setCounterpart(conversation.getNextCounterpart());
 		}
 		if (encryption == Message.ENCRYPTION_DECRYPTED) {
-			getPgpEngine().encrypt(message,callback);
+			getPgpEngine().encrypt(message, callback);
 		} else {
 			callback.success(message);
 		}
@@ -338,7 +371,6 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 		}
 		message.setCounterpart(conversation.getNextCounterpart());
 		message.setType(Message.TYPE_FILE);
-		message.setStatus(Message.STATUS_OFFERED);
 		String path = getFileBackend().getOriginalPath(uri);
 		if (path!=null) {
 			message.setRelativeFilePath(path);
@@ -349,7 +381,7 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 				callback.success(message);
 			}
 		} else {
-			new Thread(new Runnable() {
+			mFileAddingExecutor.execute(new Runnable() {
 				@Override
 				public void run() {
 					try {
@@ -361,11 +393,10 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 							callback.success(message);
 						}
 					} catch (FileBackend.FileCopyException e) {
-						callback.error(e.getResId(),message);
+						callback.error(e.getResId(), message);
 					}
 				}
-			}).start();
-
+			});
 		}
 	}
 
@@ -381,8 +412,7 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 		}
 		message.setCounterpart(conversation.getNextCounterpart());
 		message.setType(Message.TYPE_IMAGE);
-		message.setStatus(Message.STATUS_OFFERED);
-		new Thread(new Runnable() {
+		mFileAddingExecutor.execute(new Runnable() {
 
 			@Override
 			public void run() {
@@ -397,7 +427,7 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 					callback.error(e.getResId(), message);
 				}
 			}
-		}).start();
+		});
 	}
 
 	public Conversation find(Bookmark bookmark) {
@@ -413,6 +443,11 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 		final String action = intent == null ? null : intent.getAction();
 		if (action != null) {
 			switch (action) {
+				case ConnectivityManager.CONNECTIVITY_ACTION:
+					if (hasInternetConnection() && Config.RESET_ATTEMPT_COUNT_ON_NETWORK_CHANGE) {
+						resetAllAttemptCounts(true);
+					}
+					break;
 				case ACTION_MERGE_PHONE_CONTACTS:
 					if (mRestoredFromDatabase) {
 						PhoneHelper.loadPhoneContacts(getApplicationContext(),
@@ -431,14 +466,7 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 					toggleForegroundService();
 					break;
 				case ACTION_TRY_AGAIN:
-					for(Account account : accounts) {
-						if (account.hasErrorStatus()) {
-							final XmppConnection connection = account.getXmppConnection();
-							if (connection != null) {
-								connection.resetAttemptCount();
-							}
-						}
-					}
+					resetAllAttemptCounts(false);
 					break;
 				case ACTION_DISABLE_ACCOUNT:
 					try {
@@ -475,9 +503,15 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 						long lastSent = account.getXmppConnection().getLastPingSent();
 						long pingInterval = "ui".equals(action) ? Config.PING_MIN_INTERVAL * 1000 : Config.PING_MAX_INTERVAL * 1000;
 						long msToNextPing = (Math.max(lastReceived,lastSent) + pingInterval) - SystemClock.elapsedRealtime();
-						if (lastSent > lastReceived && (lastSent +  Config.PING_TIMEOUT * 1000) < SystemClock.elapsedRealtime()) {
-							Log.d(Config.LOGTAG, account.getJid().toBareJid()+ ": ping timeout");
-							this.reconnectAccount(account, true);
+						long pingTimeoutIn = (lastSent + Config.PING_TIMEOUT * 1000) - SystemClock.elapsedRealtime();
+						if (lastSent > lastReceived) {
+							if (pingTimeoutIn < 0) {
+								Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": ping timeout");
+								this.reconnectAccount(account, true);
+							} else {
+								int secs = (int) (pingTimeoutIn / 1000);
+								this.scheduleWakeUpCall(secs,account.getUuid().hashCode());
+							}
 						} else if (msToNextPing <= 0) {
 							account.getXmppConnection().sendPing();
 							Log.d(Config.LOGTAG, account.getJid().toBareJid()+" send ping");
@@ -520,6 +554,18 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 		return START_STICKY;
 	}
 
+	private void resetAllAttemptCounts(boolean reallyAll) {
+		Log.d(Config.LOGTAG,"resetting all attepmt counts");
+		for(Account account : accounts) {
+			if (account.hasErrorStatus() || reallyAll) {
+				final XmppConnection connection = account.getXmppConnection();
+				if (connection != null) {
+					connection.resetAttemptCount();
+				}
+			}
+		}
+	}
+
 	public boolean hasInternetConnection() {
 		ConnectivityManager cm = (ConnectivityManager) getApplicationContext()
 			.getSystemService(Context.CONNECTIVITY_SERVICE);
@@ -552,9 +598,7 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 		ExceptionHelper.init(getApplicationContext());
 		PRNGFixes.apply();
 		this.mRandom = new SecureRandom();
-		this.mMemorizingTrustManager = new MemorizingTrustManager(
-				getApplicationContext());
-
+		updateMemorizingTrustmanager();
 		final int maxMemory = (int) (Runtime.getRuntime().maxMemory() / 1024);
 		final int cacheSize = maxMemory / 8;
 		this.mBitmapCache = new LruCache<String, Bitmap>(cacheSize) {
@@ -568,7 +612,7 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 		this.accounts = databaseBackend.getAccounts();
 
 		for (final Account account : this.accounts) {
-			account.initOtrEngine(this);
+			account.initAccountServices(this);
 		}
 		restoreFromDatabase();
 
@@ -580,6 +624,7 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 		this.pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
 		this.wakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK,"XmppConnectionService");
 		toggleForegroundService();
+		updateUnreadCountBadge();
 	}
 
 	public void toggleForegroundService() {
@@ -607,7 +652,7 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 		}
 		Context context = getApplicationContext();
 		AlarmManager alarmManager = (AlarmManager) context
-			.getSystemService(Context.ALARM_SERVICE);
+				.getSystemService(Context.ALARM_SERVICE);
 		Intent intent = new Intent(context, EventReceiver.class);
 		alarmManager.cancel(PendingIntent.getBroadcast(context, 0, intent, 0));
 		Log.d(Config.LOGTAG, "good bye");
@@ -615,7 +660,7 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 	}
 
 	protected void scheduleWakeUpCall(int seconds, int requestCode) {
-		final long timeToWake = SystemClock.elapsedRealtime() + (seconds + 1) * 1000;
+		final long timeToWake = SystemClock.elapsedRealtime() + (seconds < 0 ? 1 : seconds + 1) * 1000;
 
 		Context context = getApplicationContext();
 		AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
@@ -649,114 +694,138 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 		}
 	}
 
+	private void sendFileMessage(final Message message) {
+		Log.d(Config.LOGTAG, "send file message");
+		final Account account = message.getConversation().getAccount();
+		final XmppConnection connection = account.getXmppConnection();
+		if (connection != null && connection.getFeatures().httpUpload()) {
+			mHttpConnectionManager.createNewUploadConnection(message);
+		} else {
+			mJingleConnectionManager.createNewConnection(message);
+		}
+	}
+
 	public void sendMessage(final Message message) {
+		sendMessage(message, false);
+	}
+
+	private void sendMessage(final Message message, final boolean resend) {
 		final Account account = message.getConversation().getAccount();
+		final Conversation conversation = message.getConversation();
 		account.deactivateGracePeriod();
-		final Conversation conv = message.getConversation();
 		MessagePacket packet = null;
 		boolean saveInDb = true;
-		boolean send = false;
-		if (account.getStatus() == Account.State.ONLINE
-				&& account.getXmppConnection() != null) {
-			if (message.getType() == Message.TYPE_IMAGE || message.getType() == Message.TYPE_FILE) {
-				if (message.getCounterpart() != null) {
-					if (message.getEncryption() == Message.ENCRYPTION_OTR) {
-						if (!conv.hasValidOtrSession()) {
-							conv.startOtrSession(message.getCounterpart().getResourcepart(),true);
-							message.setStatus(Message.STATUS_WAITING);
-						} else if (conv.hasValidOtrSession()
-								&& conv.getOtrSession().getSessionStatus() == SessionStatus.ENCRYPTED) {
-							mJingleConnectionManager
-								.createNewConnection(message);
-								}
+		message.setStatus(Message.STATUS_WAITING);
+
+		if (!resend && message.getEncryption() != Message.ENCRYPTION_OTR) {
+			message.getConversation().endOtrIfNeeded();
+			message.getConversation().findUnsentMessagesWithOtrEncryption(new Conversation.OnMessageFound() {
+				@Override
+				public void onMessageFound(Message message) {
+					markMessage(message,Message.STATUS_SEND_FAILED);
+				}
+			});
+		}
+
+		if (account.isOnlineAndConnected()) {
+			switch (message.getEncryption()) {
+				case Message.ENCRYPTION_NONE:
+					if (message.needsUploading()) {
+						if (account.httpUploadAvailable() || message.fixCounterpart()) {
+							this.sendFileMessage(message);
+						} else {
+							break;
+						}
 					} else {
-						mJingleConnectionManager.createNewConnection(message);
-					}
-				} else {
-					if (message.getEncryption() == Message.ENCRYPTION_OTR) {
-						conv.startOtrIfNeeded();
+						packet = mMessageGenerator.generateChat(message,resend);
 					}
-					message.setStatus(Message.STATUS_WAITING);
-				}
-			} else {
-				if (message.getEncryption() == Message.ENCRYPTION_OTR) {
-					if (!conv.hasValidOtrSession() && (message.getCounterpart() != null)) {
-						conv.startOtrSession(message.getCounterpart().getResourcepart(), true);
-						message.setStatus(Message.STATUS_WAITING);
-					} else if (conv.hasValidOtrSession()) {
-						if (conv.getOtrSession().getSessionStatus() == SessionStatus.ENCRYPTED) {
-							packet = mMessageGenerator.generateOtrChat(message);
-							send = true;
+					break;
+				case Message.ENCRYPTION_PGP:
+				case Message.ENCRYPTION_DECRYPTED:
+					if (message.needsUploading()) {
+						if (account.httpUploadAvailable() || message.fixCounterpart()) {
+							this.sendFileMessage(message);
 						} else {
-							message.setStatus(Message.STATUS_WAITING);
-							conv.startOtrIfNeeded();
+							break;
 						}
 					} else {
-						message.setStatus(Message.STATUS_WAITING);
+						packet = mMessageGenerator.generatePgpChat(message,resend);
 					}
-				} else if (message.getEncryption() == Message.ENCRYPTION_DECRYPTED) {
-					message.getConversation().endOtrIfNeeded();
-					message.getConversation().findUnsentMessagesWithOtrEncryption(new Conversation.OnMessageFound() {
-						@Override
-						public void onMessageFound(Message message) {
-							markMessage(message,Message.STATUS_SEND_FAILED);
+					break;
+				case Message.ENCRYPTION_OTR:
+					SessionImpl otrSession = conversation.getOtrSession();
+					if (otrSession != null && otrSession.getSessionStatus() == SessionStatus.ENCRYPTED) {
+						try {
+							message.setCounterpart(Jid.fromSessionID(otrSession.getSessionID()));
+						} catch (InvalidJidException e) {
+							break;
 						}
-					});
-					packet = mMessageGenerator.generatePgpChat(message);
-					send = true;
-				} else {
-					message.getConversation().endOtrIfNeeded();
-					message.getConversation().findUnsentMessagesWithOtrEncryption(new Conversation.OnMessageFound() {
-						@Override
-						public void onMessageFound(Message message) {
-							markMessage(message,Message.STATUS_SEND_FAILED);
+						if (message.needsUploading()) {
+							mJingleConnectionManager.createNewConnection(message);
+						} else {
+							packet = mMessageGenerator.generateOtrChat(message,resend);
 						}
-					});
-					packet = mMessageGenerator.generateChat(message);
-					send = true;
+					} else if (otrSession == null) {
+						if (message.fixCounterpart()) {
+							conversation.startOtrSession(message.getCounterpart().getResourcepart(), true);
+						} else {
+							break;
+						}
+					}
+					break;
+			}
+			if (packet != null) {
+				if (account.getXmppConnection().getFeatures().sm() || conversation.getMode() == Conversation.MODE_MULTI) {
+					message.setStatus(Message.STATUS_UNSEND);
+				} else {
+					message.setStatus(Message.STATUS_SEND);
 				}
 			}
-			if (!account.getXmppConnection().getFeatures().sm()
-					&& conv.getMode() != Conversation.MODE_MULTI) {
-				message.setStatus(Message.STATUS_SEND);
-					}
 		} else {
-			message.setStatus(Message.STATUS_WAITING);
-			if (message.getType() == Message.TYPE_TEXT) {
-				if (message.getEncryption() == Message.ENCRYPTION_DECRYPTED) {
-					String pgpBody = message.getEncryptedBody();
-					String decryptedBody = message.getBody();
-					message.setBody(pgpBody);
-					message.setEncryption(Message.ENCRYPTION_PGP);
-					databaseBackend.createMessage(message);
-					saveInDb = false;
-					message.setBody(decryptedBody);
-					message.setEncryption(Message.ENCRYPTION_DECRYPTED);
-				} else if (message.getEncryption() == Message.ENCRYPTION_OTR) {
-					if (!conv.hasValidOtrSession()
-							&& message.getCounterpart() != null) {
-						conv.startOtrSession(message.getCounterpart().getResourcepart(), false);
-							}
-				}
+			switch(message.getEncryption()) {
+				case Message.ENCRYPTION_DECRYPTED:
+					if (!message.needsUploading()) {
+						String pgpBody = message.getEncryptedBody();
+						String decryptedBody = message.getBody();
+						message.setBody(pgpBody);
+						message.setEncryption(Message.ENCRYPTION_PGP);
+						databaseBackend.createMessage(message);
+						saveInDb = false;
+						message.setBody(decryptedBody);
+						message.setEncryption(Message.ENCRYPTION_DECRYPTED);
+					}
+					break;
+				case Message.ENCRYPTION_OTR:
+					if (!conversation.hasValidOtrSession() && message.getCounterpart() != null) {
+						conversation.startOtrSession(message.getCounterpart().getResourcepart(), false);
+					}
+					break;
 			}
-
 		}
-		conv.add(message);
-		if (saveInDb) {
-			if (message.getEncryption() == Message.ENCRYPTION_NONE
-					|| saveEncryptedMessages()) {
+
+		if (resend) {
+			if (packet != null) {
+				if (account.getXmppConnection().getFeatures().sm() || conversation.getMode() == Conversation.MODE_MULTI) {
+					markMessage(message,Message.STATUS_UNSEND);
+				} else {
+					markMessage(message,Message.STATUS_SEND);
+				}
+			}
+		} else {
+			conversation.add(message);
+			if (saveInDb && (message.getEncryption() == Message.ENCRYPTION_NONE || saveEncryptedMessages())) {
 				databaseBackend.createMessage(message);
-					}
+			}
+			updateConversationUi();
 		}
-		if ((send) && (packet != null)) {
-			if (conv.setOutgoingChatState(Config.DEFAULT_CHATSTATE)) {
+		if (packet != null) {
+			if (conversation.setOutgoingChatState(Config.DEFAULT_CHATSTATE)) {
 				if (this.sendChatStates()) {
-					packet.addChild(ChatState.toElement(conv.getOutgoingChatState()));
+					packet.addChild(ChatState.toElement(conversation.getOutgoingChatState()));
 				}
 			}
 			sendMessagePacket(account, packet);
 		}
-		updateConversationUi();
 	}
 
 	private void sendUnsentMessages(final Conversation conversation) {
@@ -769,79 +838,8 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 		});
 	}
 
-	private void resendMessage(final Message message) {
-		Account account = message.getConversation().getAccount();
-		MessagePacket packet = null;
-		if (message.getEncryption() == Message.ENCRYPTION_OTR) {
-			Presences presences = message.getConversation().getContact()
-				.getPresences();
-			if (!message.getConversation().hasValidOtrSession()) {
-				if ((message.getCounterpart() != null)
-						&& (presences.has(message.getCounterpart().getResourcepart()))) {
-					message.getConversation().startOtrSession(message.getCounterpart().getResourcepart(), true);
-				} else {
-					if (presences.size() == 1) {
-						String presence = presences.asStringArray()[0];
-						message.getConversation().startOtrSession(presence, true);
-					}
-				}
-			} else {
-				if (message.getConversation().getOtrSession()
-						.getSessionStatus() == SessionStatus.ENCRYPTED) {
-					try {
-						message.setCounterpart(Jid.fromSessionID(message.getConversation().getOtrSession().getSessionID()));
-						if (message.getType() == Message.TYPE_TEXT) {
-							packet = mMessageGenerator.generateOtrChat(message,
-									true);
-						} else if (message.getType() == Message.TYPE_IMAGE || message.getType() == Message.TYPE_FILE) {
-							mJingleConnectionManager.createNewConnection(message);
-						}
-					} catch (final InvalidJidException ignored) {
-
-					}
-						}
-			}
-		} else if (message.getType() == Message.TYPE_TEXT) {
-			if (message.getEncryption() == Message.ENCRYPTION_NONE) {
-				packet = mMessageGenerator.generateChat(message, true);
-			} else if ((message.getEncryption() == Message.ENCRYPTION_DECRYPTED)
-					|| (message.getEncryption() == Message.ENCRYPTION_PGP)) {
-				packet = mMessageGenerator.generatePgpChat(message, true);
-					}
-		} else if (message.getType() == Message.TYPE_IMAGE || message.getType() == Message.TYPE_FILE) {
-			Contact contact = message.getConversation().getContact();
-			Presences presences = contact.getPresences();
-			if ((message.getCounterpart() != null)
-					&& (presences.has(message.getCounterpart().getResourcepart()))) {
-				markMessage(message, Message.STATUS_OFFERED);
-				mJingleConnectionManager.createNewConnection(message);
-			} else {
-				if (presences.size() == 1) {
-					String presence = presences.asStringArray()[0];
-					try {
-						message.setCounterpart(Jid.fromParts(contact.getJid().getLocalpart(), contact.getJid().getDomainpart(), presence));
-					} catch (InvalidJidException e) {
-						return;
-					}
-					markMessage(message, Message.STATUS_OFFERED);
-					mJingleConnectionManager.createNewConnection(message);
-				}
-			}
-		}
-		if (packet != null) {
-			if (!account.getXmppConnection().getFeatures().sm()
-					&& message.getConversation().getMode() != Conversation.MODE_MULTI) {
-				markMessage(message, Message.STATUS_SEND);
-			} else {
-				markMessage(message, Message.STATUS_UNSEND);
-			}
-			if (message.getConversation().setOutgoingChatState(Config.DEFAULT_CHATSTATE)) {
-				if (this.sendChatStates()) {
-					packet.addChild(ChatState.toElement(message.getConversation().getOutgoingChatState()));
-				}
-			}
-			sendMessagePacket(account, packet);
-		}
+	public void resendMessage(final Message message) {
+		sendMessage(message, true);
 	}
 
 	public void fetchRosterFromServer(final Account account) {
@@ -852,9 +850,8 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 		} else {
 			Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": fetching roster");
 		}
-		iqPacket.query(Xmlns.ROSTER).setAttribute("ver",
-				account.getRosterVersion());
-		account.getXmppConnection().sendIqPacket(iqPacket, mIqParser);
+		iqPacket.query(Xmlns.ROSTER).setAttribute("ver",account.getRosterVersion());
+		sendIqPacket(account,iqPacket,mIqParser);
 	}
 
 	public void fetchBookmarks(final Account account) {
@@ -899,7 +896,7 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 		for (Bookmark bookmark : account.getBookmarks()) {
 			storage.addChild(bookmark);
 		}
-		sendIqPacket(account, iqPacket, null);
+		sendIqPacket(account, iqPacket, mDefaultIqHandler);
 	}
 
 	public void onPhoneContactsLoaded(final List<Bundle> phoneContacts) {
@@ -911,7 +908,7 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 			public void run() {
 				Log.d(Config.LOGTAG,"start merging phone contacts with roster");
 				for (Account account : accounts) {
-					account.getRoster().clearSystemAccounts();
+					List<Contact> withSystemAccounts = account.getRoster().getWithSystemAccounts();
 					for (Bundle phoneContact : phoneContacts) {
 						if (Thread.interrupted()) {
 							Log.d(Config.LOGTAG,"interrupted merging phone contacts");
@@ -928,9 +925,18 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 							+ "#"
 							+ phoneContact.getString("lookup");
 						contact.setSystemAccount(systemAccount);
-						contact.setPhotoUri(phoneContact.getString("photouri"));
-						getAvatarService().clear(contact);
+						if (contact.setPhotoUri(phoneContact.getString("photouri"))) {
+							getAvatarService().clear(contact);
+						}
 						contact.setSystemName(phoneContact.getString("displayname"));
+						withSystemAccounts.remove(contact);
+					}
+					for(Contact contact : withSystemAccounts) {
+						contact.setSystemAccount(null);
+						contact.setSystemName(null);
+						if (contact.setPhotoUri(null)) {
+							getAvatarService().clear(contact);
+						}
 					}
 				}
 				Log.d(Config.LOGTAG,"finished merging phone contacts");
@@ -951,7 +957,7 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 				Account account = accountLookupTable.get(conversation.getAccountUuid());
 				conversation.setAccount(account);
 			}
-			new Thread(new Runnable() {
+			Runnable runnable =new Runnable() {
 				@Override
 				public void run() {
 					Log.d(Config.LOGTAG,"restoring roster");
@@ -972,7 +978,8 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 					Log.d(Config.LOGTAG,"restored all messages");
 					updateConversationUi();
 				}
-			}).start();
+			};
+			mDatabaseExecutor.execute(runnable);
 		}
 	}
 
@@ -986,7 +993,7 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 			@Override
 			public void onMessageFound(Message message) {
 				if (!getFileBackend().isFileAvailable(message)) {
-					message.setDownloadable(new DownloadablePlaceholder(Downloadable.STATUS_DELETED));
+					message.setTransferable(new TransferablePlaceholder(Transferable.STATUS_DELETED));
 				}
 			}
 		});
@@ -997,7 +1004,7 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 			Message message = conversation.findMessageWithFileAndUuid(uuid);
 			if (message != null) {
 				if (!getFileBackend().isFileAvailable(message)) {
-					message.setDownloadable(new DownloadablePlaceholder(Downloadable.STATUS_DELETED));
+					message.setTransferable(new TransferablePlaceholder(Transferable.STATUS_DELETED));
 					updateConversationUi();
 				}
 				return;
@@ -1009,13 +1016,14 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 		populateWithOrderedConversations(list, true);
 	}
 
-	public void populateWithOrderedConversations(final List<Conversation> list, boolean includeConferences) {
+	public void populateWithOrderedConversations(final List<Conversation> list, boolean includeNoFileUpload) {
 		list.clear();
-		if (includeConferences) {
+		if (includeNoFileUpload) {
 			list.addAll(getConversations());
 		} else {
 			for (Conversation conversation : getConversations()) {
-				if (conversation.getMode() == Conversation.MODE_SINGLE) {
+				if (conversation.getMode() == Conversation.MODE_SINGLE
+						|| conversation.getAccount().httpUploadAvailable()) {
 					list.add(conversation);
 				}
 			}
@@ -1037,11 +1045,11 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 	}
 
 	public void loadMoreMessages(final Conversation conversation, final long timestamp, final OnMoreMessagesLoaded callback) {
-		Log.d(Config.LOGTAG,"load more messages for "+conversation.getName() + " prior to "+MessageGenerator.getTimestamp(timestamp));
+		Log.d(Config.LOGTAG, "load more messages for " + conversation.getName() + " prior to " + MessageGenerator.getTimestamp(timestamp));
 		if (XmppConnectionService.this.getMessageArchiveService().queryInProgress(conversation,callback)) {
 			return;
 		}
-		new Thread(new Runnable() {
+		Runnable runnable = new Runnable() {
 			@Override
 			public void run() {
 				final Account account = conversation.getAccount();
@@ -1060,7 +1068,8 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 					callback.informUser(R.string.fetching_history_from_server);
 				}
 			}
-		}).start();
+		};
+		mDatabaseExecutor.execute(runnable);
 	}
 
 	public List<Account> getAccounts() {
@@ -1149,6 +1158,7 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 	}
 
 	public void archiveConversation(Conversation conversation) {
+		getNotificationService().clear(conversation);
 		conversation.setStatus(Conversation.STATUS_ARCHIVED);
 		conversation.setNextEncryption(-1);
 		synchronized (this.conversations) {
@@ -1171,7 +1181,7 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 	}
 
 	public void createAccount(final Account account) {
-		account.initOtrEngine(this);
+		account.initAccountServices(this);
 		databaseBackend.createAccount(account);
 		this.accounts.add(account);
 		this.reconnectAccountInBackground(account);
@@ -1251,6 +1261,32 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 		}
 	}
 
+	public void setOnShowErrorToastListener(OnShowErrorToast onShowErrorToast) {
+		synchronized (this) {
+			if (checkListeners()) {
+				switchToForeground();
+			}
+			this.mOnShowErrorToast = onShowErrorToast;
+			if (this.showErrorToastListenerCount < 2) {
+				this.showErrorToastListenerCount++;
+			}
+		}
+		this.mOnShowErrorToast = onShowErrorToast;
+	}
+
+	public void removeOnShowErrorToastListener() {
+		synchronized (this) {
+			this.showErrorToastListenerCount--;
+			if (this.showErrorToastListenerCount <= 0) {
+				this.showErrorToastListenerCount = 0;
+				this.mOnShowErrorToast = null;
+				if (checkListeners()) {
+					switchToBackground();
+				}
+			}
+		}
+	}
+
 	public void setOnAccountListChangedListener(OnAccountUpdate listener) {
 		synchronized (this) {
 			if (checkListeners()) {
@@ -1355,7 +1391,8 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 		return (this.mOnAccountUpdate == null
 				&& this.mOnConversationUpdate == null
 				&& this.mOnRosterUpdate == null
-				&& this.mOnUpdateBlocklist == null);
+				&& this.mOnUpdateBlocklist == null
+				&& this.mOnShowErrorToast == null);
 	}
 
 	private void switchToForeground() {
@@ -1558,6 +1595,9 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 						for (Jid invite : jids) {
 							invite(conversation, invite);
 						}
+						if (account.countPresences() > 1) {
+							directInvite(conversation, account.getJid().toBareJid());
+						}
 						if (callback != null) {
 							callback.success(conversation);
 						}
@@ -1678,12 +1718,12 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 	public void changeAffiliationsInConference(final Conversation conference, MucOptions.Affiliation before, MucOptions.Affiliation after) {
 		List<Jid> jids = new ArrayList<>();
 		for (MucOptions.User user : conference.getMucOptions().getUsers()) {
-			if (user.getAffiliation() == before) {
+			if (user.getAffiliation() == before && user.getJid() != null) {
 				jids.add(user.getJid());
 			}
 		}
 		IqPacket request = this.mIqGenerator.changeAffiliation(conference, jids, after.toString());
-		sendIqPacket(conference.getAccount(), request, null);
+		sendIqPacket(conference.getAccount(), request, mDefaultIqHandler);
 	}
 
 	public void changeRoleInConference(final Conversation conference, final String nick, MucOptions.Role role, final OnRoleChanged callback) {
@@ -1720,6 +1760,7 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 						}
 					}
 				}
+				sendOfflinePresence(account);
 			}
 			account.getXmppConnection().disconnect(force);
 		}
@@ -1773,15 +1814,15 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 				} catch (InvalidJidException e) {
 					return;
 				}
-				if (message.getType() == Message.TYPE_TEXT) {
+				if (message.needsUploading()) {
+					mJingleConnectionManager.createNewConnection(message);
+				} else {
 					MessagePacket outPacket = mMessageGenerator.generateOtrChat(message, true);
 					if (outPacket != null) {
 						message.setStatus(Message.STATUS_SEND);
 						databaseBackend.updateMessage(message);
 						sendMessagePacket(account, outPacket);
 					}
-				} else if (message.getType() == Message.TYPE_IMAGE || message.getType() == Message.TYPE_FILE) {
-					mJingleConnectionManager.createNewConnection(message);
 				}
 				updateConversationUi();
 			}
@@ -1826,7 +1867,7 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 					&& contact.getOption(Contact.Options.PREEMPTIVE_GRANT);
 			final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
 			iq.query(Xmlns.ROSTER).addChild(contact.asElement());
-			account.getXmppConnection().sendIqPacket(iq, null);
+			account.getXmppConnection().sendIqPacket(iq, mDefaultIqHandler);
 			if (sendUpdates) {
 				sendPresencePacket(account,
 						mPresenceGenerator.sendPresenceUpdatesTo(contact));
@@ -1874,6 +1915,7 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 														   IqPacket result) {
 								if (result.getType() == IqPacket.TYPE.RESULT) {
 									if (account.setAvatar(avatar.getFilename())) {
+										getAvatarService().clear(account);
 										databaseBackend.updateAccount(account);
 									}
 									callback.success(avatar);
@@ -1900,13 +1942,39 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 		fetchAvatar(account, avatar, null);
 	}
 
-	public void fetchAvatar(Account account, final Avatar avatar,
-							final UiCallback<Avatar> callback) {
-		IqPacket packet = this.mIqGenerator.retrieveAvatar(avatar);
+	private static String generateFetchKey(Account account, final Avatar avatar) {
+		return account.getJid().toBareJid()+"_"+avatar.owner+"_"+avatar.sha1sum;
+	}
+
+	public void fetchAvatar(Account account, final Avatar avatar, final UiCallback<Avatar> callback) {
+		final String KEY = generateFetchKey(account, avatar);
+		synchronized(this.mInProgressAvatarFetches) {
+			if (this.mInProgressAvatarFetches.contains(KEY)) {
+				return;
+			} else {
+				switch (avatar.origin) {
+					case PEP:
+						this.mInProgressAvatarFetches.add(KEY);
+						fetchAvatarPep(account, avatar, callback);
+						break;
+					case VCARD:
+						this.mInProgressAvatarFetches.add(KEY);
+						fetchAvatarVcard(account, avatar, callback);
+						break;
+				}
+			}
+		}
+	}
+
+	private void fetchAvatarPep(Account account, final Avatar avatar, final UiCallback<Avatar> callback) {
+		IqPacket packet = this.mIqGenerator.retrievePepAvatar(avatar);
 		sendIqPacket(account, packet, new OnIqPacketReceived() {
 
 			@Override
 			public void onIqPacketReceived(Account account, IqPacket result) {
+				synchronized (mInProgressAvatarFetches) {
+					mInProgressAvatarFetches.remove(generateFetchKey(account, avatar));
+				}
 				final String ERROR = account.getJid().toBareJid()
 						+ ": fetching avatar for " + avatar.owner + " failed ";
 				if (result.getType() == IqPacket.TYPE.RESULT) {
@@ -1923,7 +1991,7 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 							} else {
 								Contact contact = account.getRoster()
 										.getContact(avatar.owner);
-								contact.setAvatar(avatar.getFilename());
+								contact.setAvatar(avatar);
 								getAvatarService().clear(contact);
 								updateConversationUi();
 								updateRosterUi();
@@ -1932,8 +2000,7 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 								callback.success(avatar);
 							}
 							Log.d(Config.LOGTAG, account.getJid().toBareJid()
-									+ ": succesfully fetched avatar for "
-									+ avatar.owner);
+									+ ": succesfuly fetched pep avatar for " + avatar.owner);
 							return;
 						}
 					} else {
@@ -1956,8 +2023,37 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 		});
 	}
 
-	public void checkForAvatar(Account account,
-							   final UiCallback<Avatar> callback) {
+	private void fetchAvatarVcard(final Account account, final Avatar avatar, final UiCallback<Avatar> callback) {
+		IqPacket packet = this.mIqGenerator.retrieveVcardAvatar(avatar);
+		this.sendIqPacket(account, packet, new OnIqPacketReceived() {
+			@Override
+			public void onIqPacketReceived(Account account, IqPacket packet) {
+				synchronized (mInProgressAvatarFetches) {
+					mInProgressAvatarFetches.remove(generateFetchKey(account, avatar));
+				}
+				if (packet.getType() == IqPacket.TYPE.RESULT) {
+					Element vCard = packet.findChild("vCard", "vcard-temp");
+					Element photo = vCard != null ? vCard.findChild("PHOTO") : null;
+					String image = photo != null ? photo.findChildContent("BINVAL") : null;
+					if (image != null) {
+						avatar.image = image;
+						if (getFileBackend().save(avatar)) {
+							Log.d(Config.LOGTAG, account.getJid().toBareJid()
+									+ ": successfully fetched vCard avatar for " + avatar.owner);
+							Contact contact = account.getRoster()
+									.getContact(avatar.owner);
+							contact.setAvatar(avatar);
+							getAvatarService().clear(contact);
+							updateConversationUi();
+							updateRosterUi();
+						}
+					}
+				}
+			}
+		});
+	}
+
+	public void checkForAvatar(Account account, final UiCallback<Avatar> callback) {
 		IqPacket packet = this.mIqGenerator.retrieveAvatarMetaData(null);
 		this.sendIqPacket(account, packet, new OnIqPacketReceived() {
 
@@ -1979,7 +2075,7 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 									getAvatarService().clear(account);
 									callback.success(avatar);
 								} else {
-									fetchAvatar(account, avatar, callback);
+									fetchAvatarPep(account, avatar, callback);
 								}
 								return;
 							}
@@ -2001,7 +2097,7 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 			Element item = iq.query(Xmlns.ROSTER).addChild("item");
 			item.setAttribute("jid", contact.getJid().toString());
 			item.setAttribute("subscription", "remove");
-			account.getXmppConnection().sendIqPacket(iq, null);
+			account.getXmppConnection().sendIqPacket(iq, mDefaultIqHandler);
 		}
 	}
 
@@ -2015,6 +2111,16 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 				disconnect(account, force);
 			}
 			if (!account.isOptionSet(Account.OPTION_DISABLED)) {
+
+				synchronized (this.mInProgressAvatarFetches) {
+					for(Iterator<String> iterator = this.mInProgressAvatarFetches.iterator(); iterator.hasNext();) {
+						final String KEY = iterator.next();
+						if (KEY.startsWith(account.getJid().toBareJid()+"_")) {
+							iterator.remove();
+						}
+					}
+				}
+
 				if (account.getXmppConnection() == null) {
 					account.setXmppConnection(createConnection(account));
 				}
@@ -2038,10 +2144,16 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 	}
 
 	public void invite(Conversation conversation, Jid contact) {
+		Log.d(Config.LOGTAG,conversation.getAccount().getJid().toBareJid()+": inviting "+contact+" to "+conversation.getJid().toBareJid());
 		MessagePacket packet = mMessageGenerator.invite(conversation, contact);
 		sendMessagePacket(conversation.getAccount(), packet);
 	}
 
+	public void directInvite(Conversation conversation, Jid jid) {
+		MessagePacket packet = mMessageGenerator.directInvite(conversation, jid);
+		sendMessagePacket(conversation.getAccount(),packet);
+	}
+
 	public void resetSendingToWaiting(Account account) {
 		for (Conversation conversation : getConversations()) {
 			if (conversation.getAccount() == account) {
@@ -2106,6 +2218,9 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 	public boolean forceEncryption() {
 		return getPreferences().getBoolean("force_encryption", false);
 	}
+	public boolean confirmMessages() {
+		return getPreferences().getBoolean("confirm_messages", true);
+	}
 
 	public boolean sendChatStates() {
 		return getPreferences().getBoolean("chat_states", false);
@@ -2127,6 +2242,13 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 		return count;
 	}
 
+
+	public void showErrorToastInUi(int resId) {
+		if (mOnShowErrorToast != null) {
+			mOnShowErrorToast.onShowErrorToast(resId);
+		}
+	}
+
 	public void updateConversationUi() {
 		if (mOnConversationUpdate != null) {
 			mOnConversationUpdate.onConversationUpdate();
@@ -2178,6 +2300,20 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 	public void markRead(final Conversation conversation) {
 		mNotificationService.clear(conversation);
 		conversation.markRead();
+		updateUnreadCountBadge();
+	}
+
+	public synchronized void updateUnreadCountBadge() {
+		int count = unreadCount();
+		if (unreadCount != count) {
+			Log.d(Config.LOGTAG, "update unread count to " + count);
+			if (count > 0) {
+				ShortcutBadger.with(getApplicationContext()).count(count);
+			} else {
+				ShortcutBadger.with(getApplicationContext()).remove();
+			}
+			unreadCount = count;
+		}
 	}
 
 	public void sendReadMarker(final Conversation conversation) {
@@ -2201,6 +2337,21 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 		return this.mMemorizingTrustManager;
 	}
 
+	public void setMemorizingTrustManager(MemorizingTrustManager trustManager) {
+		this.mMemorizingTrustManager = trustManager;
+	}
+
+	public void updateMemorizingTrustmanager() {
+		final MemorizingTrustManager tm;
+		final boolean dontTrustSystemCAs = getPreferences().getBoolean("dont_trust_system_cas", false);
+		if (dontTrustSystemCAs) {
+			 tm = new MemorizingTrustManager(getApplicationContext(), null);
+		} else {
+			tm = new MemorizingTrustManager(getApplicationContext());
+		}
+		setMemorizingTrustManager(tm);
+	}
+
 	public PowerManager getPowerManager() {
 		return this.pm;
 	}
@@ -2210,13 +2361,14 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 	}
 
 	public void syncRosterToDisk(final Account account) {
-		new Thread(new Runnable() {
+		Runnable runnable = new Runnable() {
 
 			@Override
 			public void run() {
 				databaseBackend.writeRoster(account.getRoster());
 			}
-		}).start();
+		};
+		mDatabaseExecutor.execute(runnable);
 
 	}
 
@@ -2276,6 +2428,10 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 		sendPresencePacket(account, mPresenceGenerator.sendPresence(account));
 	}
 
+	public void sendOfflinePresence(final Account account) {
+		sendPresencePacket(account, mPresenceGenerator.sendOfflinePresence(account));
+	}
+
 	public MessageGenerator getMessageGenerator() {
 		return this.mMessageGenerator;
 	}
@@ -2426,6 +2582,10 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 		public void onPushFailed();
 	}
 
+	public interface OnShowErrorToast {
+		void onShowErrorToast(int resId);
+	}
+
 	public class XmppConnectionBinder extends Binder {
 		public XmppConnectionService getService() {
 			return XmppConnectionService.this;
diff --git a/src/main/java/eu/siacs/conversations/ui/ConferenceDetailsActivity.java b/src/main/java/eu/siacs/conversations/ui/ConferenceDetailsActivity.java
index e4bfd6ff..07b8819d 100644
--- a/src/main/java/eu/siacs/conversations/ui/ConferenceDetailsActivity.java
+++ b/src/main/java/eu/siacs/conversations/ui/ConferenceDetailsActivity.java
@@ -237,6 +237,9 @@ public class ConferenceDetailsActivity extends XmppActivity implements OnConvers
 		MenuItem menuItemDeleteBookmark = menu.findItem(R.id.action_delete_bookmark);
 		MenuItem menuItemAdvancedMode = menu.findItem(R.id.action_advanced_mode);
 		menuItemAdvancedMode.setChecked(mAdvancedMode);
+		if (mConversation == null) {
+			return true;
+		}
 		Account account = mConversation.getAccount();
 		if (account.hasBookmarkFor(mConversation.getJid().toBareJid())) {
 			menuItemSaveBookmark.setVisible(false);
@@ -382,6 +385,10 @@ public class ConferenceDetailsActivity extends XmppActivity implements OnConvers
 
 	@Override
 	void onBackendConnected() {
+		if (mPendingConferenceInvite != null) {
+			mPendingConferenceInvite.execute(this);
+			mPendingConferenceInvite = null;
+		}
 		if (getIntent().getAction().equals(ACTION_VIEW_MUC)) {
 			this.uuid = getIntent().getExtras().getString("uuid");
 		}
diff --git a/src/main/java/eu/siacs/conversations/ui/ContactDetailsActivity.java b/src/main/java/eu/siacs/conversations/ui/ContactDetailsActivity.java
index 40a4587c..c190caed 100644
--- a/src/main/java/eu/siacs/conversations/ui/ContactDetailsActivity.java
+++ b/src/main/java/eu/siacs/conversations/ui/ContactDetailsActivity.java
@@ -10,6 +10,7 @@ import android.content.SharedPreferences;
 import android.net.Uri;
 import android.os.Bundle;
 import android.preference.PreferenceManager;
+import android.provider.ContactsContract;
 import android.provider.ContactsContract.CommonDataKinds;
 import android.provider.ContactsContract.Contacts;
 import android.provider.ContactsContract.Intents;
@@ -126,14 +127,23 @@ public class ContactDetailsActivity extends XmppActivity implements OnAccountUpd
 
 		@Override
 		public void onClick(View v) {
-			AlertDialog.Builder builder = new AlertDialog.Builder(
-					ContactDetailsActivity.this);
-			builder.setTitle(getString(R.string.action_add_phone_book));
-			builder.setMessage(getString(R.string.add_phone_book_text,
+			if (contact.getSystemAccount() == null) {
+				AlertDialog.Builder builder = new AlertDialog.Builder(
+						ContactDetailsActivity.this);
+				builder.setTitle(getString(R.string.action_add_phone_book));
+				builder.setMessage(getString(R.string.add_phone_book_text,
 						contact.getJid()));
-			builder.setNegativeButton(getString(R.string.cancel), null);
-			builder.setPositiveButton(getString(R.string.add), addToPhonebook);
-			builder.create().show();
+				builder.setNegativeButton(getString(R.string.cancel), null);
+				builder.setPositiveButton(getString(R.string.add), addToPhonebook);
+				builder.create().show();
+			} else {
+					String[] systemAccount = contact.getSystemAccount().split("#");
+					long id = Long.parseLong(systemAccount[0]);
+					Uri uri = ContactsContract.Contacts.getLookupUri(id, systemAccount[1]);
+					Intent intent = new Intent(Intent.ACTION_VIEW);
+					intent.setData(uri);
+					startActivity(intent);
+			}
 		}
 	};
 
@@ -256,16 +266,19 @@ public class ContactDetailsActivity extends XmppActivity implements OnAccountUpd
 		MenuItem unblock = menu.findItem(R.id.action_unblock);
 		MenuItem edit = menu.findItem(R.id.action_edit_contact);
 		MenuItem delete = menu.findItem(R.id.action_delete_contact);
+		if (contact == null) {
+			return true;
+		}
 		final XmppConnection connection = contact.getAccount().getXmppConnection();
 		if (connection != null && connection.getFeatures().blocking()) {
 			if (this.contact.isBlocked()) {
-				menu.findItem(R.id.action_block).setVisible(false);
+				block.setVisible(false);
 			} else {
-				menu.findItem(R.id.action_unblock).setVisible(false);
+				unblock.setVisible(false);
 			}
 		} else {
-			menu.findItem(R.id.action_unblock).setVisible(false);
-			menu.findItem(R.id.action_block).setVisible(false);
+			unblock.setVisible(false);
+			block.setVisible(false);
 		}
 		if (!contact.showInRoster()) {
 			edit.setVisible(false);
@@ -275,6 +288,7 @@ public class ContactDetailsActivity extends XmppActivity implements OnAccountUpd
 	}
 
 	private void populateView() {
+		invalidateOptionsMenu();
 		setTitle(contact.getDisplayName());
 		if (contact.showInRoster()) {
 			send.setVisibility(View.VISIBLE);
@@ -336,12 +350,9 @@ public class ContactDetailsActivity extends XmppActivity implements OnAccountUpd
 		} else {
 			contactJidTv.setText(contact.getJid().toString());
 		}
-		accountJidTv.setText(getString(R.string.using_account, contact
-					.getAccount().getJid().toBareJid()));
-		prepareContactBadge(badge, contact);
-		if (contact.getSystemAccount() == null) {
-			badge.setOnClickListener(onBadgeClick);
-		}
+		accountJidTv.setText(getString(R.string.using_account, contact.getAccount().getJid().toBareJid()));
+		badge.setImageBitmap(avatarService().get(contact, getPixel(72)));
+		badge.setOnClickListener(this.onBadgeClick);
 
 		keys.removeAllViews();
 		boolean hasKeys = false;
@@ -415,15 +426,6 @@ public class ContactDetailsActivity extends XmppActivity implements OnAccountUpd
 		}
 	}
 
-	private void prepareContactBadge(QuickContactBadge badge, Contact contact) {
-		if (contact.getSystemAccount() != null) {
-			String[] systemAccount = contact.getSystemAccount().split("#");
-			long id = Long.parseLong(systemAccount[0]);
-			badge.assignContactUri(Contacts.getLookupUri(id, systemAccount[1]));
-		}
-		badge.setImageBitmap(avatarService().get(contact, getPixel(72)));
-	}
-
 	protected void confirmToDeleteFingerprint(final String fingerprint) {
 		AlertDialog.Builder builder = new AlertDialog.Builder(this);
 		builder.setTitle(R.string.delete_fingerprint);
diff --git a/src/main/java/eu/siacs/conversations/ui/ConversationActivity.java b/src/main/java/eu/siacs/conversations/ui/ConversationActivity.java
index 0fbaa479..0504ff34 100644
--- a/src/main/java/eu/siacs/conversations/ui/ConversationActivity.java
+++ b/src/main/java/eu/siacs/conversations/ui/ConversationActivity.java
@@ -5,6 +5,7 @@ import android.app.ActionBar;
 import android.app.AlertDialog;
 import android.app.FragmentTransaction;
 import android.app.PendingIntent;
+import android.content.ClipData;
 import android.content.DialogInterface;
 import android.content.DialogInterface.OnClickListener;
 import android.content.Intent;
@@ -22,21 +23,24 @@ import android.widget.AdapterView;
 import android.widget.AdapterView.OnItemClickListener;
 import android.widget.ArrayAdapter;
 import android.widget.CheckBox;
-import android.widget.ListView;
 import android.widget.PopupMenu;
 import android.widget.PopupMenu.OnMenuItemClickListener;
 import android.widget.Toast;
 
 import net.java.otr4j.session.SessionStatus;
+import de.timroes.android.listview.EnhancedListView;
 
 import java.util.ArrayList;
+import java.util.Iterator;
 import java.util.List;
 
 import eu.siacs.conversations.R;
+import eu.siacs.conversations.entities.Account;
 import eu.siacs.conversations.entities.Blockable;
 import eu.siacs.conversations.entities.Contact;
 import eu.siacs.conversations.entities.Conversation;
 import eu.siacs.conversations.entities.Message;
+import eu.siacs.conversations.services.XmppConnectionService;
 import eu.siacs.conversations.services.XmppConnectionService.OnAccountUpdate;
 import eu.siacs.conversations.services.XmppConnectionService.OnConversationUpdate;
 import eu.siacs.conversations.services.XmppConnectionService.OnRosterUpdate;
@@ -46,7 +50,7 @@ import eu.siacs.conversations.xmpp.OnUpdateBlocklist;
 import github.ankushsachdeva.emojicon.EmojiconEditText;
 
 public class ConversationActivity extends XmppActivity
-	implements OnAccountUpdate, OnConversationUpdate, OnRosterUpdate, OnUpdateBlocklist {
+	implements OnAccountUpdate, OnConversationUpdate, OnRosterUpdate, OnUpdateBlocklist, XmppConnectionService.OnShowErrorToast {
 
 	public static final String ACTION_DOWNLOAD = "eu.siacs.conversations.action.DOWNLOAD";
 
@@ -59,26 +63,27 @@ public class ConversationActivity extends XmppActivity
 	public static final int REQUEST_SEND_MESSAGE = 0x0201;
 	public static final int REQUEST_DECRYPT_PGP = 0x0202;
 	public static final int REQUEST_ENCRYPT_MESSAGE = 0x0207;
-	private static final int ATTACHMENT_CHOICE_CHOOSE_IMAGE = 0x0301;
-	private static final int ATTACHMENT_CHOICE_TAKE_PHOTO = 0x0302;
-	private static final int ATTACHMENT_CHOICE_CHOOSE_FILE = 0x0303;
-	private static final int ATTACHMENT_CHOICE_RECORD_VOICE = 0x0304;
-	private static final int ATTACHMENT_CHOICE_LOCATION = 0x0305;
+	public static final int ATTACHMENT_CHOICE_CHOOSE_IMAGE = 0x0301;
+	public static final int ATTACHMENT_CHOICE_TAKE_PHOTO = 0x0302;
+	public static final int ATTACHMENT_CHOICE_CHOOSE_FILE = 0x0303;
+	public static final int ATTACHMENT_CHOICE_RECORD_VOICE = 0x0304;
+	public static final int ATTACHMENT_CHOICE_LOCATION = 0x0305;
 	private static final String STATE_OPEN_CONVERSATION = "state_open_conversation";
 	private static final String STATE_PANEL_OPEN = "state_panel_open";
 	private static final String STATE_PENDING_URI = "state_pending_uri";
 
 	private String mOpenConverstaion = null;
 	private boolean mPanelOpen = true;
-	private Uri mPendingImageUri = null;
-	private Uri mPendingFileUri = null;
+	final private List<Uri> mPendingImageUris = new ArrayList<>();
+	final private List<Uri> mPendingFileUris = new ArrayList<>();
 	private Uri mPendingGeoUri = null;
 
 	private View mContentView;
 
 	private List<Conversation> conversationList = new ArrayList<>();
+	private Conversation swipedConversation = null;
 	private Conversation mSelectedConversation = null;
-	private ListView listView;
+	private EnhancedListView listView;
 	private ConversationFragment mConversationFragment;
 
 	private ArrayAdapter<Conversation> listAdapter;
@@ -142,12 +147,13 @@ public class ConversationActivity extends XmppActivity
 	protected void onCreate(final Bundle savedInstanceState) {
 		super.onCreate(savedInstanceState);
 		if (savedInstanceState != null) {
-            mOpenConverstaion = savedInstanceState.getString(STATE_OPEN_CONVERSATION, null);
-            mPanelOpen = savedInstanceState.getBoolean(STATE_PANEL_OPEN, true);
-            String pending = savedInstanceState.getString(STATE_PENDING_URI, null);
-            if (pending != null) {
-                mPendingImageUri = Uri.parse(pending);
-            }
+			mOpenConverstaion = savedInstanceState.getString(STATE_OPEN_CONVERSATION, null);
+			mPanelOpen = savedInstanceState.getBoolean(STATE_PANEL_OPEN, true);
+			String pending = savedInstanceState.getString(STATE_PENDING_URI, null);
+			if (pending != null) {
+				mPendingImageUris.clear();
+				mPendingImageUris.add(Uri.parse(pending));
+			}
 		}
 
 		setContentView(R.layout.fragment_conversations_overview);
@@ -157,7 +163,7 @@ public class ConversationActivity extends XmppActivity
 		transaction.replace(R.id.selected_conversation, this.mConversationFragment, "conversation");
 		transaction.commit();
 
-		listView = (ListView) findViewById(R.id.list);
+		listView = (EnhancedListView) findViewById(R.id.list);
 		this.listAdapter = new ConversationAdapter(this, conversationList);
 		listView.setAdapter(this.listAdapter);
 
@@ -179,6 +185,73 @@ public class ConversationActivity extends XmppActivity
 				openConversation();
 			}
 		});
+
+		listView.setDismissCallback(new EnhancedListView.OnDismissCallback() {
+
+			@Override
+			public EnhancedListView.Undoable onDismiss(final EnhancedListView enhancedListView, final int position) {
+
+				final int index = listView.getFirstVisiblePosition();
+				View v = listView.getChildAt(0);
+				final int top = (v == null) ? 0 : (v.getTop() - listView.getPaddingTop());
+
+				swipedConversation = listAdapter.getItem(position);
+				listAdapter.remove(swipedConversation);
+				swipedConversation.markRead();
+				xmppConnectionService.getNotificationService().clear(swipedConversation);
+
+				final boolean formerlySelected = (getSelectedConversation() == swipedConversation);
+				if (position == 0 && listAdapter.getCount() == 0) {
+					endConversation(swipedConversation, false, true);
+					return null;
+				} else if (formerlySelected) {
+					setSelectedConversation(listAdapter.getItem(0));
+					ConversationActivity.this.mConversationFragment
+							.reInit(getSelectedConversation());
+				}
+
+				return new EnhancedListView.Undoable() {
+
+					@Override
+					public void undo() {
+						listAdapter.insert(swipedConversation, position);
+						if (formerlySelected) {
+							setSelectedConversation(swipedConversation);
+							ConversationActivity.this.mConversationFragment
+									.reInit(getSelectedConversation());
+						}
+						swipedConversation = null;
+						listView.setSelectionFromTop(index + (listView.getChildCount() < position ? 1 : 0), top);
+					}
+
+					@Override
+					public void discard() {
+						if (!swipedConversation.isRead()
+								&& swipedConversation.getMode() == Conversation.MODE_SINGLE) {
+							swipedConversation = null;
+							return;
+						}
+						endConversation(swipedConversation, false, false);
+						swipedConversation = null;
+					}
+
+					@Override
+					public String getTitle() {
+						if (swipedConversation.getMode() == Conversation.MODE_MULTI) {
+							return getResources().getString(R.string.title_undo_swipe_out_muc);
+						} else {
+							return getResources().getString(R.string.title_undo_swipe_out_conversation);
+						}
+					}
+				};
+			}
+		});
+		listView.enableSwipeToDismiss();
+		listView.setSwipingLayout(R.id.swipeable_item);
+		listView.setUndoStyle(EnhancedListView.UndoStyle.SINGLE_POPUP);
+		listView.setUndoHideDelay(5000);
+		listView.setRequireTouchBeforeDismiss(false);
+
 		mContentView = findViewById(R.id.content_view_spl);
 		if (mContentView == null) {
 			mContentView = findViewById(R.id.content_view_ll);
@@ -205,6 +278,7 @@ public class ConversationActivity extends XmppActivity
 
 				@Override
 				public void onPanelClosed(View arg0) {
+					listView.discardUndo();
 					openConversation();
 				}
 
@@ -301,17 +375,16 @@ public class ConversationActivity extends XmppActivity
 		} else {
 			menuAdd.setVisible(!isConversationsOverviewHideable());
 			if (this.getSelectedConversation() != null) {
-				if (this.getSelectedConversation().getLatestMessage()
-						.getEncryption() != Message.ENCRYPTION_NONE) {
+				if (this.getSelectedConversation().getNextEncryption(forceEncryption()) != Message.ENCRYPTION_NONE) {
 					if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
-						menuSecure.setIcon(R.drawable.ic_lock_outline_white_48dp);
+						menuSecure.setIcon(R.drawable.ic_lock_white_24dp);
 					} else {
 						menuSecure.setIcon(R.drawable.ic_action_secure);
 					}
 				}
 				if (this.getSelectedConversation().getMode() == Conversation.MODE_MULTI) {
 					menuContactDetails.setVisible(false);
-					menuAttach.setVisible(false);
+					menuAttach.setVisible(getSelectedConversation().getAccount().httpUploadAvailable());
 					menuInviteContact.setVisible(getSelectedConversation().getMucOptions().canInvite());
 				} else {
 					menuMucDetails.setVisible(false);
@@ -327,56 +400,93 @@ public class ConversationActivity extends XmppActivity
 	}
 
 	private void selectPresenceToAttachFile(final int attachmentChoice, final int encryption) {
-		if (attachmentChoice == ATTACHMENT_CHOICE_LOCATION && encryption != Message.ENCRYPTION_OTR) {
-			getSelectedConversation().setNextCounterpart(null);
-			Intent intent = new Intent("eu.siacs.conversations.location.request");
-			startActivityForResult(intent,attachmentChoice);
-		} else {
-			selectPresence(getSelectedConversation(), new OnPresenceSelected() {
+		final Conversation conversation = getSelectedConversation();
+		final Account account = conversation.getAccount();
+		final OnPresenceSelected callback = new OnPresenceSelected() {
 
-				@Override
-				public void onPresenceSelected() {
-					Intent intent = new Intent();
-					boolean chooser = false;
-					switch (attachmentChoice) {
-						case ATTACHMENT_CHOICE_CHOOSE_IMAGE:
-							intent.setAction(Intent.ACTION_GET_CONTENT);
-							intent.setType("image/*");
-							chooser = true;
-							break;
-						case ATTACHMENT_CHOICE_TAKE_PHOTO:
-							mPendingImageUri = xmppConnectionService.getFileBackend().getTakePhotoUri();
-							intent.setAction(MediaStore.ACTION_IMAGE_CAPTURE);
-							intent.putExtra(MediaStore.EXTRA_OUTPUT, mPendingImageUri);
-							break;
-						case ATTACHMENT_CHOICE_CHOOSE_FILE:
-							chooser = true;
-							intent.setType("*/*");
-							intent.addCategory(Intent.CATEGORY_OPENABLE);
-							intent.setAction(Intent.ACTION_GET_CONTENT);
-							break;
-						case ATTACHMENT_CHOICE_RECORD_VOICE:
-							intent.setAction(MediaStore.Audio.Media.RECORD_SOUND_ACTION);
-							break;
-						case ATTACHMENT_CHOICE_LOCATION:
-							intent.setAction("eu.siacs.conversations.location.request");
-							break;
-					}
-					if (intent.resolveActivity(getPackageManager()) != null) {
-						if (chooser) {
-							startActivityForResult(
-									Intent.createChooser(intent, getString(R.string.perform_action_with)),
-									attachmentChoice);
-						} else {
-							startActivityForResult(intent, attachmentChoice);
+			@Override
+			public void onPresenceSelected() {
+				Intent intent = new Intent();
+				boolean chooser = false;
+				String fallbackPackageId = null;
+				switch (attachmentChoice) {
+					case ATTACHMENT_CHOICE_CHOOSE_IMAGE:
+						intent.setAction(Intent.ACTION_GET_CONTENT);
+						if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2) {
+							intent.putExtra(Intent.EXTRA_ALLOW_MULTIPLE,true);
 						}
+						intent.setType("image/*");
+						chooser = true;
+						break;
+					case ATTACHMENT_CHOICE_TAKE_PHOTO:
+						Uri uri = xmppConnectionService.getFileBackend().getTakePhotoUri();
+						intent.setAction(MediaStore.ACTION_IMAGE_CAPTURE);
+						intent.putExtra(MediaStore.EXTRA_OUTPUT, uri);
+						mPendingImageUris.clear();
+						mPendingImageUris.add(uri);
+						break;
+					case ATTACHMENT_CHOICE_CHOOSE_FILE:
+						chooser = true;
+						intent.setType("*/*");
+						intent.addCategory(Intent.CATEGORY_OPENABLE);
+						intent.setAction(Intent.ACTION_GET_CONTENT);
+						break;
+					case ATTACHMENT_CHOICE_RECORD_VOICE:
+						intent.setAction(MediaStore.Audio.Media.RECORD_SOUND_ACTION);
+						fallbackPackageId = "eu.siacs.conversations.voicerecorder";
+						break;
+					case ATTACHMENT_CHOICE_LOCATION:
+						intent.setAction("eu.siacs.conversations.location.request");
+						fallbackPackageId = "eu.siacs.conversations.sharelocation";
+						break;
+				}
+				if (intent.resolveActivity(getPackageManager()) != null) {
+					if (chooser) {
+						startActivityForResult(
+								Intent.createChooser(intent, getString(R.string.perform_action_with)),
+								attachmentChoice);
+					} else {
+						startActivityForResult(intent, attachmentChoice);
 					}
+				} else if (fallbackPackageId != null) {
+					startActivity(getInstallApkIntent(fallbackPackageId));
 				}
-			});
+			}
+		};
+		if ((account.httpUploadAvailable() || attachmentChoice == ATTACHMENT_CHOICE_LOCATION) && encryption != Message.ENCRYPTION_OTR) {
+			conversation.setNextCounterpart(null);
+			callback.onPresenceSelected();
+		} else {
+			selectPresence(conversation, callback);
+		}
+	}
+
+	private Intent getInstallApkIntent(final String packageId) {
+		Intent intent = new Intent(Intent.ACTION_VIEW);
+		intent.setData(Uri.parse("market://details?id="+packageId));
+		if (intent.resolveActivity(getPackageManager()) != null) {
+			return intent;
+		} else {
+			intent.setData(Uri.parse("http://play.google.com/store/apps/details?id=" + packageId));
+			return intent;
 		}
 	}
 
-	private void attachFile(final int attachmentChoice) {
+	public void attachFile(final int attachmentChoice) {
+		switch (attachmentChoice) {
+			case ATTACHMENT_CHOICE_LOCATION:
+				getPreferences().edit().putString("recently_used_quick_action","location").apply();
+				break;
+			case ATTACHMENT_CHOICE_RECORD_VOICE:
+				getPreferences().edit().putString("recently_used_quick_action","voice").apply();
+				break;
+			case ATTACHMENT_CHOICE_TAKE_PHOTO:
+				getPreferences().edit().putString("recently_used_quick_action","photo").apply();
+				break;
+			case ATTACHMENT_CHOICE_CHOOSE_IMAGE:
+				getPreferences().edit().putString("recently_used_quick_action","picture").apply();
+				break;
+		}
 		final Conversation conversation = getSelectedConversation();
 		final int encryption = conversation.getNextEncryption(forceEncryption());
 		if (encryption == Message.ENCRYPTION_PGP) {
@@ -425,7 +535,7 @@ public class ConversationActivity extends XmppActivity
 				showInstallPgpDialog();
 			}
 		} else {
-			selectPresenceToAttachFile(attachmentChoice,encryption);
+			selectPresenceToAttachFile(attachmentChoice, encryption);
 		}
 	}
 
@@ -486,13 +596,21 @@ public class ConversationActivity extends XmppActivity
 	}
 
 	public void endConversation(Conversation conversation) {
-		showConversationsOverview();
+		endConversation(conversation, true, true);
+	}
+
+	public void endConversation(Conversation conversation, boolean showOverview, boolean reinit) {
+		if (showOverview) {
+			showConversationsOverview();
+		}
 		xmppConnectionService.archiveConversation(conversation);
-		if (conversationList.size() > 0) {
-			setSelectedConversation(conversationList.get(0));
-			this.mConversationFragment.reInit(getSelectedConversation());
-		} else {
-			setSelectedConversation(null);
+		if (reinit) {
+			if (conversationList.size() > 0) {
+				setSelectedConversation(conversationList.get(0));
+				this.mConversationFragment.reInit(getSelectedConversation());
+			} else {
+				setSelectedConversation(null);
+			}
 		}
 	}
 
@@ -582,13 +700,13 @@ public class ConversationActivity extends XmppActivity
 				intent.putExtra("account", conversation.getAccount().getJid().toBareJid().toString());
 				switch (menuItem.getItemId()) {
 					case R.id.scan_fingerprint:
-						intent.putExtra("mode",VerifyOTRActivity.MODE_SCAN_FINGERPRINT);
+						intent.putExtra("mode", VerifyOTRActivity.MODE_SCAN_FINGERPRINT);
 						break;
 					case R.id.ask_question:
-						intent.putExtra("mode",VerifyOTRActivity.MODE_ASK_QUESTION);
+						intent.putExtra("mode", VerifyOTRActivity.MODE_ASK_QUESTION);
 						break;
 					case R.id.manual_verification:
-						intent.putExtra("mode",VerifyOTRActivity.MODE_MANUAL_VERIFICATION);
+						intent.putExtra("mode", VerifyOTRActivity.MODE_MANUAL_VERIFICATION);
 						break;
 				}
 				startActivity(intent);
@@ -622,14 +740,11 @@ public class ConversationActivity extends XmppActivity
 							break;
 						case R.id.encryption_choice_pgp:
 							if (hasPgp()) {
-								if (conversation.getAccount().getKeys()
-										.has("pgp_signature")) {
-									conversation
-										.setNextEncryption(Message.ENCRYPTION_PGP);
+								if (conversation.getAccount().getKeys().has("pgp_signature")) {
+									conversation.setNextEncryption(Message.ENCRYPTION_PGP);
 									item.setChecked(true);
 								} else {
-									announcePgp(conversation.getAccount(),
-											conversation);
+									announcePgp(conversation.getAccount(),conversation);
 								}
 							} else {
 								showInstallPgpDialog();
@@ -639,16 +754,16 @@ public class ConversationActivity extends XmppActivity
 							conversation.setNextEncryption(Message.ENCRYPTION_NONE);
 							break;
 					}
-					xmppConnectionService.databaseBackend
-						.updateConversation(conversation);
+					xmppConnectionService.databaseBackend.updateConversation(conversation);
 					fragment.updateChatMsgHint();
+					invalidateOptionsMenu();
 					return true;
 				}
 			});
 			popup.inflate(R.menu.encryption_choices);
 			MenuItem otr = popup.getMenu().findItem(R.id.encryption_choice_otr);
-			MenuItem none = popup.getMenu().findItem(
-					R.id.encryption_choice_none);
+			MenuItem none = popup.getMenu().findItem(R.id.encryption_choice_none);
+			MenuItem pgp = popup.getMenu().findItem(R.id.encryption_choice_pgp);
 			if (conversation.getMode() == Conversation.MODE_MULTI) {
 				otr.setEnabled(false);
 			} else {
@@ -664,12 +779,10 @@ public class ConversationActivity extends XmppActivity
 					otr.setChecked(true);
 					break;
 				case Message.ENCRYPTION_PGP:
-					popup.getMenu().findItem(R.id.encryption_choice_pgp)
-						.setChecked(true);
+					pgp.setChecked(true);
 					break;
 				default:
-					popup.getMenu().findItem(R.id.encryption_choice_none)
-						.setChecked(true);
+					none.setChecked(true);
 					break;
 			}
 			popup.show();
@@ -745,6 +858,7 @@ public class ConversationActivity extends XmppActivity
 
 	@Override
 	public void onPause() {
+		listView.discardUndo();
 		super.onPause();
 		this.mActivityPaused = true;
 		if (this.xmppConnectionServiceBound) {
@@ -780,8 +894,8 @@ public class ConversationActivity extends XmppActivity
 		}
 		savedInstanceState.putBoolean(STATE_PANEL_OPEN,
 				isConversationsOverviewVisable());
-		if (this.mPendingImageUri != null) {
-			savedInstanceState.putString(STATE_PENDING_URI, this.mPendingImageUri.toString());
+		if (this.mPendingImageUris.size() >= 1) {
+			savedInstanceState.putString(STATE_PENDING_URI, this.mPendingImageUris.get(0).toString());
 		}
 		super.onSaveInstanceState(savedInstanceState);
 	}
@@ -790,6 +904,12 @@ public class ConversationActivity extends XmppActivity
 	void onBackendConnected() {
 		this.xmppConnectionService.getNotificationService().setIsInForeground(true);
 		updateConversationList();
+
+		if (mPendingConferenceInvite != null) {
+			mPendingConferenceInvite.execute(this);
+			mPendingConferenceInvite = null;
+		}
+
 		if (xmppConnectionService.getAccounts().size() == 0) {
 			if (!mRedirected) {
 				this.mRedirected = true;
@@ -816,25 +936,25 @@ public class ConversationActivity extends XmppActivity
 			}
 			this.mConversationFragment.reInit(getSelectedConversation());
 			mOpenConverstaion = null;
-		} else if (getSelectedConversation() != null) {
-			this.mConversationFragment.reInit(getSelectedConversation());
-		} else {
+		} else if (getSelectedConversation() == null) {
 			showConversationsOverview();
-			mPendingImageUri = null;
-			mPendingFileUri = null;
+			mPendingImageUris.clear();
+			mPendingFileUris.clear();
 			mPendingGeoUri = null;
 			setSelectedConversation(conversationList.get(0));
 			this.mConversationFragment.reInit(getSelectedConversation());
 		}
 
-		if (mPendingImageUri != null) {
-			attachImageToConversation(getSelectedConversation(),mPendingImageUri);
-			mPendingImageUri = null;
-		} else if (mPendingFileUri != null) {
-			attachFileToConversation(getSelectedConversation(),mPendingFileUri);
-			mPendingFileUri = null;
-		} else if (mPendingGeoUri != null) {
-			attachLocationToConversation(getSelectedConversation(),mPendingGeoUri);
+		for(Iterator<Uri> i = mPendingImageUris.iterator(); i.hasNext(); i.remove()) {
+			attachImageToConversation(getSelectedConversation(),i.next());
+		}
+
+		for(Iterator<Uri> i = mPendingFileUris.iterator(); i.hasNext(); i.remove()) {
+			attachFileToConversation(getSelectedConversation(),i.next());
+		}
+
+		if (mPendingGeoUri != null) {
+			attachLocationToConversation(getSelectedConversation(), mPendingGeoUri);
 			mPendingGeoUri = null;
 		}
 		ExceptionHelper.checkForCrash(this, this.xmppConnectionService);
@@ -842,10 +962,10 @@ public class ConversationActivity extends XmppActivity
 	}
 
 	private void handleViewConversationIntent(final Intent intent) {
-		final String uuid = (String) intent.getExtras().get(CONVERSATION);
-		final String downloadUuid = (String) intent.getExtras().get(MESSAGE);
-		final String text = intent.getExtras().getString(TEXT, "");
-		final String nick = intent.getExtras().getString(NICK, null);
+		final String uuid = intent.getStringExtra(CONVERSATION);
+		final String downloadUuid = intent.getStringExtra(MESSAGE);
+		final String text = intent.getStringExtra(TEXT);
+		final String nick = intent.getStringExtra(NICK);
 		if (selectConversationByUuid(uuid)) {
 			this.mConversationFragment.reInit(getSelectedConversation());
 			if (nick != null) {
@@ -886,6 +1006,21 @@ public class ConversationActivity extends XmppActivity
 		xmppConnectionService.getNotificationService().setOpenConversation(null);
 	}
 
+	@SuppressLint("NewApi")
+	private static List<Uri> extractUriFromIntent(final Intent intent) {
+		List<Uri> uris = new ArrayList<>();
+		Uri uri = intent.getData();
+		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2 && uri == null) {
+			ClipData clipData = intent.getClipData();
+			for(int i = 0; i < clipData.getItemCount(); ++i) {
+				uris.add(clipData.getItemAt(i).getUri());
+			}
+		} else {
+			uris.add(uri);
+		}
+		return uris;
+	}
+
 	@Override
 	protected void onActivityResult(int requestCode, int resultCode,
 			final Intent data) {
@@ -895,25 +1030,34 @@ public class ConversationActivity extends XmppActivity
 				mConversationFragment.hideSnackbar();
 				mConversationFragment.updateMessages();
 			} else if (requestCode == ATTACHMENT_CHOICE_CHOOSE_IMAGE) {
-				mPendingImageUri = data.getData();
+				mPendingImageUris.clear();
+				mPendingImageUris.addAll(extractUriFromIntent(data));
 				if (xmppConnectionServiceBound) {
-					attachImageToConversation(getSelectedConversation(),mPendingImageUri);
-					mPendingImageUri = null;
+					for(Iterator<Uri> i = mPendingImageUris.iterator(); i.hasNext(); i.remove()) {
+						attachImageToConversation(getSelectedConversation(),i.next());
+					}
 				}
 			} else if (requestCode == ATTACHMENT_CHOICE_CHOOSE_FILE || requestCode == ATTACHMENT_CHOICE_RECORD_VOICE) {
-				mPendingFileUri = data.getData();
+				mPendingFileUris.clear();
+				mPendingFileUris.addAll(extractUriFromIntent(data));
 				if (xmppConnectionServiceBound) {
-					attachFileToConversation(getSelectedConversation(),mPendingFileUri);
-					mPendingFileUri = null;
+					for(Iterator<Uri> i = mPendingFileUris.iterator(); i.hasNext(); i.remove()) {
+						attachFileToConversation(getSelectedConversation(), i.next());
+					}
 				}
-			} else if (requestCode == ATTACHMENT_CHOICE_TAKE_PHOTO && mPendingImageUri != null) {
-				if (xmppConnectionServiceBound) {
-					attachImageToConversation(getSelectedConversation(),mPendingImageUri);
-					mPendingImageUri = null;
+			} else if (requestCode == ATTACHMENT_CHOICE_TAKE_PHOTO) {
+				if (mPendingImageUris.size() == 1) {
+					Uri uri = mPendingImageUris.get(0);
+					if (xmppConnectionServiceBound) {
+						attachImageToConversation(getSelectedConversation(), uri);
+						mPendingImageUris.clear();
+					}
+					Intent intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
+					intent.setData(uri);
+					sendBroadcast(intent);
+				} else {
+					mPendingImageUris.clear();
 				}
-				Intent intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
-				intent.setData(mPendingImageUri);
-				sendBroadcast(intent);
 			} else if (requestCode == ATTACHMENT_CHOICE_LOCATION) {
 				double latitude = data.getDoubleExtra("latitude",0);
 				double longitude = data.getDoubleExtra("longitude",0);
@@ -924,13 +1068,15 @@ public class ConversationActivity extends XmppActivity
 				}
 			}
 		} else {
-			if (requestCode == ATTACHMENT_CHOICE_TAKE_PHOTO) {
-				mPendingImageUri = null;
-			}
+			mPendingImageUris.clear();
+			mPendingFileUris.clear();
 		}
 	}
 
 	private void attachLocationToConversation(Conversation conversation, Uri uri) {
+		if (conversation == null) {
+			return;
+		}
 		xmppConnectionService.attachLocationToConversation(conversation,uri, new UiCallback<Message>() {
 
 			@Override
@@ -951,10 +1097,12 @@ public class ConversationActivity extends XmppActivity
 	}
 
 	private void attachFileToConversation(Conversation conversation, Uri uri) {
-		prepareFileToast = Toast.makeText(getApplicationContext(),
-				getText(R.string.preparing_file), Toast.LENGTH_LONG);
+		if (conversation == null) {
+			return;
+		}
+		prepareFileToast = Toast.makeText(getApplicationContext(),getText(R.string.preparing_file), Toast.LENGTH_LONG);
 		prepareFileToast.show();
-		xmppConnectionService.attachFileToConversation(conversation,uri, new UiCallback<Message>() {
+		xmppConnectionService.attachFileToConversation(conversation, uri, new UiCallback<Message>() {
 			@Override
 			public void success(Message message) {
 				hidePrepareFileToast();
@@ -974,8 +1122,10 @@ public class ConversationActivity extends XmppActivity
 	}
 
 	private void attachImageToConversation(Conversation conversation, Uri uri) {
-		prepareFileToast = Toast.makeText(getApplicationContext(),
-				getText(R.string.preparing_image), Toast.LENGTH_LONG);
+		if (conversation == null) {
+			return;
+		}
+		prepareFileToast = Toast.makeText(getApplicationContext(),getText(R.string.preparing_image), Toast.LENGTH_LONG);
 		prepareFileToast.show();
 		xmppConnectionService.attachImageToConversation(conversation, uri,
 				new UiCallback<Message>() {
@@ -1014,6 +1164,13 @@ public class ConversationActivity extends XmppActivity
 	public void updateConversationList() {
 		xmppConnectionService
 			.populateWithOrderedConversations(conversationList);
+		if (swipedConversation != null) {
+			if (swipedConversation.isRead()) {
+				conversationList.remove(swipedConversation);
+			} else {
+				listView.discardUndo();
+			}
+		}
 		listAdapter.notifyDataSetChanged();
 	}
 
@@ -1053,6 +1210,10 @@ public class ConversationActivity extends XmppActivity
 		return getPreferences().getBoolean("force_encryption", false);
 	}
 
+	public boolean useSendButtonToIndicateStatus() {
+		return getPreferences().getBoolean("send_button_status", false);
+	}
+
 	public boolean indicateReceived() {
 		return getPreferences().getBoolean("indicate_received", false);
 	}
@@ -1113,4 +1274,14 @@ public class ConversationActivity extends XmppActivity
 	public boolean enterIsSend() {
 		return getPreferences().getBoolean("enter_is_send",false);
 	}
+
+	@Override
+	public void onShowErrorToast(final int resId) {
+		runOnUiThread(new Runnable() {
+			@Override
+			public void run() {
+				Toast.makeText(ConversationActivity.this,resId,Toast.LENGTH_SHORT).show();
+			}
+		});
+	}
 }
diff --git a/src/main/java/eu/siacs/conversations/ui/ConversationFragment.java b/src/main/java/eu/siacs/conversations/ui/ConversationFragment.java
index 4f359d9c..5a672520 100644
--- a/src/main/java/eu/siacs/conversations/ui/ConversationFragment.java
+++ b/src/main/java/eu/siacs/conversations/ui/ConversationFragment.java
@@ -3,12 +3,12 @@ package eu.siacs.conversations.ui;
 import android.app.AlertDialog;
 import android.app.Fragment;
 import android.app.PendingIntent;
+import android.content.ActivityNotFoundException;
 import android.content.Context;
 import android.content.DialogInterface;
 import android.content.Intent;
 import android.content.IntentSender;
 import android.content.IntentSender.SendIntentException;
-import android.net.Uri;
 import android.os.Bundle;
 import android.text.InputType;
 import android.view.ContextMenu;
@@ -37,7 +37,6 @@ import android.widget.Toast;
 
 import net.java.otr4j.session.SessionStatus;
 
-import java.net.URLConnection;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.NoSuchElementException;
@@ -50,9 +49,9 @@ import eu.siacs.conversations.crypto.PgpEngine;
 import eu.siacs.conversations.entities.Account;
 import eu.siacs.conversations.entities.Contact;
 import eu.siacs.conversations.entities.Conversation;
-import eu.siacs.conversations.entities.Downloadable;
+import eu.siacs.conversations.entities.Transferable;
 import eu.siacs.conversations.entities.DownloadableFile;
-import eu.siacs.conversations.entities.DownloadablePlaceholder;
+import eu.siacs.conversations.entities.TransferablePlaceholder;
 import eu.siacs.conversations.entities.Message;
 import eu.siacs.conversations.entities.MucOptions;
 import eu.siacs.conversations.entities.Presences;
@@ -63,6 +62,7 @@ import eu.siacs.conversations.ui.adapter.MessageAdapter;
 import eu.siacs.conversations.ui.adapter.MessageAdapter.OnContactPictureClicked;
 import eu.siacs.conversations.ui.adapter.MessageAdapter.OnContactPictureLongClicked;
 import eu.siacs.conversations.utils.GeoHelper;
+import eu.siacs.conversations.utils.UIHelper;
 import eu.siacs.conversations.xmpp.chatstate.ChatState;
 import eu.siacs.conversations.xmpp.jid.Jid;
 import github.ankushsachdeva.emojicon.EmojiconEditText;
@@ -128,16 +128,37 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 
 		}
 
+		private int getIndexOf(String uuid, List<Message> messages) {
+			if (uuid == null) {
+				return 0;
+			}
+			for(int i = 0; i < messages.size(); ++i) {
+				if (uuid.equals(messages.get(i).getUuid())) {
+					return i;
+				} else {
+					Message next = messages.get(i);
+					while(next != null && next.wasMergedIntoPrevious()) {
+						if (uuid.equals(next.getUuid())) {
+							return i;
+						}
+						next = next.next();
+					}
+
+				}
+			}
+			return 0;
+		}
+
 		@Override
 		public void onScroll(AbsListView view, int firstVisibleItem,
-				int visibleItemCount, int totalItemCount) {
+							 int visibleItemCount, int totalItemCount) {
 			synchronized (ConversationFragment.this.messageList) {
 				if (firstVisibleItem < 5 && messagesLoaded && messageList.size() > 0) {
 					long timestamp = ConversationFragment.this.messageList.get(0).getTimeSent();
 					messagesLoaded = false;
 					activity.xmppConnectionService.loadMoreMessages(conversation, timestamp, new XmppConnectionService.OnMoreMessagesLoaded() {
 						@Override
-						public void onMoreMessagesLoaded(final int count, Conversation conversation) {
+						public void onMoreMessagesLoaded(final int c, Conversation conversation) {
 							if (ConversationFragment.this.conversation != conversation) {
 								return;
 							}
@@ -145,29 +166,18 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 								@Override
 								public void run() {
 									final int oldPosition = messagesView.getFirstVisiblePosition();
+									Message message = messageList.get(oldPosition);
+									String uuid = message != null ? message.getUuid() : null;
 									View v = messagesView.getChildAt(0);
 									final int pxOffset = (v == null) ? 0 : v.getTop();
 									ConversationFragment.this.conversation.populateWithMessages(ConversationFragment.this.messageList);
 									updateStatusMessages();
 									messageListAdapter.notifyDataSetChanged();
-									if (count != 0) {
-										final int newPosition = oldPosition + count;
-										int offset = 0;
-										try {
-											Message tmpMessage = messageList.get(newPosition);
-
-											while(tmpMessage.wasMergedIntoPrevious()) {
-												offset++;
-												tmpMessage = tmpMessage.prev();
-											}
-										} catch (final IndexOutOfBoundsException ignored) {
-
-										}
-										messagesView.setSelectionFromTop(newPosition - offset, pxOffset);
-										messagesLoaded = true;
-										if (messageLoaderToast != null) {
-											messageLoaderToast.cancel();
-										}
+									int pos = getIndexOf(uuid,messageList);
+									messagesView.setSelectionFromTop(pos, pxOffset);
+									messagesLoaded = true;
+									if (messageLoaderToast != null) {
+										messageLoaderToast.cancel();
 									}
 								}
 							});
@@ -185,7 +195,7 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 									if (ConversationFragment.this.conversation != conversation) {
 										return;
 									}
-									messageLoaderToast = Toast.makeText(activity,resId,Toast.LENGTH_LONG);
+									messageLoaderToast = Toast.makeText(activity, resId, Toast.LENGTH_LONG);
 									messageLoaderToast.show();
 								}
 							});
@@ -219,7 +229,7 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 
 		@Override
 		public void onClick(View v) {
-			activity.verifyOtrSessionDialog(conversation,v);
+			activity.verifyOtrSessionDialog(conversation, v);
 		}
 	};
 	private ConcurrentLinkedQueue<Message> mEncryptedMessages = new ConcurrentLinkedQueue<>();
@@ -230,7 +240,7 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 		public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
 			if (actionId == EditorInfo.IME_ACTION_SEND) {
 				InputMethodManager imm = (InputMethodManager) v.getContext()
-					.getSystemService(Context.INPUT_METHOD_SERVICE);
+						.getSystemService(Context.INPUT_METHOD_SERVICE);
 				imm.hideSoftInputFromWindow(v.getWindowToken(), 0);
 				sendMessage();
 				return true;
@@ -243,15 +253,42 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 
 		@Override
 		public void onClick(View v) {
-			sendMessage();
+			Object tag = v.getTag();
+			if (tag instanceof SendButtonAction) {
+				SendButtonAction action = (SendButtonAction) tag;
+				switch (action) {
+					case TAKE_PHOTO:
+						activity.attachFile(ConversationActivity.ATTACHMENT_CHOICE_TAKE_PHOTO);
+						break;
+					case SEND_LOCATION:
+						activity.attachFile(ConversationActivity.ATTACHMENT_CHOICE_LOCATION);
+						break;
+					case RECORD_VOICE:
+						activity.attachFile(ConversationActivity.ATTACHMENT_CHOICE_RECORD_VOICE);
+						break;
+					case CHOOSE_PICTURE:
+						activity.attachFile(ConversationActivity.ATTACHMENT_CHOICE_CHOOSE_IMAGE);
+						break;
+					case CANCEL:
+						if (conversation != null && conversation.getMode() == Conversation.MODE_MULTI) {
+							conversation.setNextCounterpart(null);
+							updateChatMsgHint();
+							updateSendButton();
+						}
+						break;
+					default:
+						sendMessage();
+				}
+			} else {
+				sendMessage();
+			}
 		}
 	};
 	private OnClickListener clickToMuc = new OnClickListener() {
 
 		@Override
 		public void onClick(View v) {
-			Intent intent = new Intent(getActivity(),
-					ConferenceDetailsActivity.class);
+			Intent intent = new Intent(getActivity(), ConferenceDetailsActivity.class);
 			intent.setAction(ConferenceDetailsActivity.ACTION_VIEW_MUC);
 			intent.putExtra("uuid", conversation.getUuid());
 			startActivity(intent);
@@ -261,24 +298,15 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 	private Message selectedMessage;
 
 	private void sendMessage() {
-		if (this.conversation == null) {
+		final String body = mEditMessage.getText().toString();
+		if (body.length() == 0 || this.conversation == null) {
 			return;
 		}
-		if (mEditMessage.getText().length() < 1) {
-			if (this.conversation.getMode() == Conversation.MODE_MULTI) {
-				conversation.setNextCounterpart(null);
-				updateChatMsgHint();
-			}
-			return;
-		}
-		Message message = new Message(conversation, mEditMessage.getText()
-				.toString(), conversation.getNextEncryption(activity
-					.forceEncryption()));
+		Message message = new Message(conversation, body, conversation.getNextEncryption(activity.forceEncryption()));
 		if (conversation.getMode() == Conversation.MODE_MULTI) {
 			if (conversation.getNextCounterpart() != null) {
 				message.setCounterpart(conversation.getNextCounterpart());
 				message.setType(Message.TYPE_PRIVATE);
-				conversation.setNextCounterpart(null);
 			}
 		}
 		if (conversation.getNextEncryption(activity.forceEncryption()) == Message.ENCRYPTION_OTR) {
@@ -294,13 +322,13 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 		if (conversation.getMode() == Conversation.MODE_MULTI
 				&& conversation.getNextCounterpart() != null) {
 			this.mEditMessage.setHint(getString(
-						R.string.send_private_message_to,
-						conversation.getNextCounterpart().getResourcepart()));
+					R.string.send_private_message_to,
+					conversation.getNextCounterpart().getResourcepart()));
 		} else {
 			switch (conversation.getNextEncryption(activity.forceEncryption())) {
 				case Message.ENCRYPTION_NONE:
 					mEditMessage
-						.setHint(getString(R.string.send_plain_text_message));
+							.setHint(getString(R.string.send_plain_text_message));
 					break;
 				case Message.ENCRYPTION_OTR:
 					mEditMessage.setHint(getString(R.string.send_otr_message));
@@ -316,7 +344,7 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 	}
 
 	private void setupIme() {
-		if (((ConversationActivity)getActivity()).usingEnterKey()) {
+		if (((ConversationActivity) getActivity()).usingEnterKey()) {
 			mEditMessage.setInputType(mEditMessage.getInputType() & (~InputType.TYPE_TEXT_VARIATION_SHORT_MESSAGE));
 		} else {
 			mEditMessage.setInputType(mEditMessage.getInputType() | InputType.TYPE_TEXT_VARIATION_SHORT_MESSAGE);
@@ -325,9 +353,9 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 
 	@Override
 	public View onCreateView(final LayoutInflater inflater,
-			ViewGroup container, Bundle savedInstanceState) {
-		final View view = inflater.inflate(R.layout.fragment_conversation,
-				container, false);
+							 ViewGroup container, Bundle savedInstanceState) {
+		final View view = inflater.inflate(R.layout.fragment_conversation, container, false);
+		view.setOnClickListener(null);
 		mEditMessage = (EditMessage) view.findViewById(R.id.textinput);
 		setupIme();
 		mEditMessage.setOnClickListener(new OnClickListener() {
@@ -486,21 +514,21 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 			}
 		});
 		messageListAdapter
-			.setOnContactPictureLongClicked(new OnContactPictureLongClicked() {
-
-				@Override
-				public void onContactPictureLongClicked(Message message) {
-					if (message.getStatus() <= Message.STATUS_RECEIVED) {
-						if (message.getConversation().getMode() == Conversation.MODE_MULTI) {
-							if (message.getCounterpart() != null) {
-								privateMessageWith(message.getCounterpart());
+				.setOnContactPictureLongClicked(new OnContactPictureLongClicked() {
+
+					@Override
+					public void onContactPictureLongClicked(Message message) {
+						if (message.getStatus() <= Message.STATUS_RECEIVED) {
+							if (message.getConversation().getMode() == Conversation.MODE_MULTI) {
+								if (message.getCounterpart() != null) {
+									privateMessageWith(message.getCounterpart());
+								}
 							}
+						} else {
+							activity.showQrCode();
 						}
-					} else {
-						activity.showQrCode();
 					}
-				}
-			});
+				});
 		messagesView.setAdapter(messageListAdapter);
 
 		registerForContextMenu(messagesView);
@@ -510,7 +538,7 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 
 	@Override
 	public void onCreateContextMenu(ContextMenu menu, View v,
-			ContextMenuInfo menuInfo) {
+									ContextMenuInfo menuInfo) {
 		synchronized (this.messageList) {
 			super.onCreateContextMenu(menu, v, menuInfo);
 			AdapterView.AdapterContextMenuInfo acmi = (AdapterContextMenuInfo) menuInfo;
@@ -528,35 +556,37 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 			MenuItem shareWith = menu.findItem(R.id.share_with);
 			MenuItem sendAgain = menu.findItem(R.id.send_again);
 			MenuItem copyUrl = menu.findItem(R.id.copy_url);
-			MenuItem downloadImage = menu.findItem(R.id.download_image);
+			MenuItem downloadFile = menu.findItem(R.id.download_file);
 			MenuItem cancelTransmission = menu.findItem(R.id.cancel_transmission);
-			if ((m.getType() != Message.TYPE_TEXT && m.getType() != Message.TYPE_PRIVATE)
-					|| m.getDownloadable() != null || GeoHelper.isGeoUri(m.getBody())) {
-				copyText.setVisible(false);
+			if ((m.getType() == Message.TYPE_TEXT || m.getType() == Message.TYPE_PRIVATE)
+					&& m.getTransferable() == null
+					&& !GeoHelper.isGeoUri(m.getBody())
+					&& m.treatAsDownloadable() != Message.Decision.MUST) {
+				copyText.setVisible(true);
 			}
-			if ((m.getType() == Message.TYPE_TEXT
-					|| m.getType() == Message.TYPE_PRIVATE
-					|| m.getDownloadable() != null)
-				&& (!GeoHelper.isGeoUri(m.getBody()))) {
-				shareWith.setVisible(false);
+			if ((m.getType() != Message.TYPE_TEXT
+					&& m.getType() != Message.TYPE_PRIVATE
+					&& m.getTransferable() == null)
+					|| (GeoHelper.isGeoUri(m.getBody()))) {
+				shareWith.setVisible(true);
 			}
-			if (m.getStatus() != Message.STATUS_SEND_FAILED) {
-				sendAgain.setVisible(false);
+			if (m.getStatus() == Message.STATUS_SEND_FAILED) {
+				sendAgain.setVisible(true);
+			}
+			if (m.hasFileOnRemoteHost()
+					|| GeoHelper.isGeoUri(m.getBody())
+					|| m.treatAsDownloadable() == Message.Decision.MUST) {
+				copyUrl.setVisible(true);
+			}
+			if (m.getType() == Message.TYPE_TEXT && m.getTransferable() == null && m.treatAsDownloadable() != Message.Decision.NEVER) {
+				downloadFile.setVisible(true);
+				downloadFile.setTitle(activity.getString(R.string.download_x_file,UIHelper.getFileDescriptionString(activity, m)));
+			}
+			if ((m.getTransferable() != null && !(m.getTransferable() instanceof TransferablePlaceholder))
+					|| (m.isFileOrImage() && (m.getStatus() == Message.STATUS_WAITING
+					|| m.getStatus() == Message.STATUS_OFFERED))) {
+				cancelTransmission.setVisible(true);
 			}
-			if (((m.getType() != Message.TYPE_IMAGE && m.getDownloadable() == null)
-					|| m.getImageParams().url == null) && !GeoHelper.isGeoUri(m.getBody())) {
-				copyUrl.setVisible(false);
-					}
-			if (m.getType() != Message.TYPE_TEXT
-					|| m.getDownloadable() != null
-					|| !m.bodyContainsDownloadable()) {
-				downloadImage.setVisible(false);
-					}
-			if (!((m.getDownloadable() != null && !(m.getDownloadable() instanceof DownloadablePlaceholder))
-						|| (m.isFileOrImage() && (m.getStatus() == Message.STATUS_WAITING
-								|| m.getStatus() == Message.STATUS_OFFERED)))) {
-				cancelTransmission.setVisible(false);
-								}
 		}
 	}
 
@@ -575,8 +605,8 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 			case R.id.copy_url:
 				copyUrl(selectedMessage);
 				return true;
-			case R.id.download_image:
-				downloadImage(selectedMessage);
+			case R.id.download_file:
+				downloadFile(selectedMessage);
 				return true;
 			case R.id.cancel_transmission:
 				cancelTransmission(selectedMessage);
@@ -597,19 +627,23 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 					activity.xmppConnectionService.getFileBackend()
 							.getJingleFileUri(message));
 			shareIntent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
-			String path = message.getRelativeFilePath();
-			String mime = path == null ? null : URLConnection.guessContentTypeFromName(path);
+			String mime = message.getMimeType();
 			if (mime == null) {
 				mime = "image/webp";
 			}
 			shareIntent.setType(mime);
 		}
-		activity.startActivity(Intent.createChooser(shareIntent,getText(R.string.share_with)));
+		try {
+			activity.startActivity(Intent.createChooser(shareIntent, getText(R.string.share_with)));
+		} catch (ActivityNotFoundException e) {
+			//This should happen only on faulty androids because normally chooser is always available
+			Toast.makeText(activity,R.string.no_application_found_to_open_file,Toast.LENGTH_SHORT).show();
+		}
 	}
 
 	private void copyText(Message message) {
 		if (activity.copyTextToClipboard(message.getMergedBody(),
-					R.string.message_text)) {
+				R.string.message_text)) {
 			Toast.makeText(activity, R.string.message_copied_to_clipboard,
 					Toast.LENGTH_SHORT).show();
 		}
@@ -619,8 +653,8 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 		if (message.getType() == Message.TYPE_FILE || message.getType() == Message.TYPE_IMAGE) {
 			DownloadableFile file = activity.xmppConnectionService.getFileBackend().getFile(message);
 			if (!file.exists()) {
-				Toast.makeText(activity,R.string.file_deleted,Toast.LENGTH_SHORT).show();
-				message.setDownloadable(new DownloadablePlaceholder(Downloadable.STATUS_DELETED));
+				Toast.makeText(activity, R.string.file_deleted, Toast.LENGTH_SHORT).show();
+				message.setTransferable(new TransferablePlaceholder(Transferable.STATUS_DELETED));
 				return;
 			}
 		}
@@ -633,27 +667,30 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 		if (GeoHelper.isGeoUri(message.getBody())) {
 			resId = R.string.location;
 			url = message.getBody();
+		} else if (message.hasFileOnRemoteHost()) {
+			resId = R.string.file_url;
+			url = message.getFileParams().url.toString();
 		} else {
-			resId = R.string.image_url;
-			url = message.getImageParams().url.toString();
+			url = message.getBody().trim();
+			resId = R.string.file_url;
 		}
 		if (activity.copyTextToClipboard(url, resId)) {
 			Toast.makeText(activity, R.string.url_copied_to_clipboard,
 					Toast.LENGTH_SHORT).show();
-					}
+		}
 	}
 
-	private void downloadImage(Message message) {
+	private void downloadFile(Message message) {
 		activity.xmppConnectionService.getHttpConnectionManager()
-			.createNewConnection(message);
+				.createNewDownloadConnection(message);
 	}
 
 	private void cancelTransmission(Message message) {
-		Downloadable downloadable = message.getDownloadable();
-		if (downloadable!=null) {
-			downloadable.cancel();
+		Transferable transferable = message.getTransferable();
+		if (transferable != null) {
+			transferable.cancel();
 		} else {
-			activity.xmppConnectionService.markMessage(message,Message.STATUS_SEND_FAILED);
+			activity.xmppConnectionService.markMessage(message, Message.STATUS_SEND_FAILED);
 		}
 	}
 
@@ -661,6 +698,7 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 		this.mEditMessage.setText("");
 		this.conversation.setNextCounterpart(counterpart);
 		updateChatMsgHint();
+		updateSendButton();
 	}
 
 	protected void highlightInConference(String nick) {
@@ -669,9 +707,9 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 			mEditMessage.getText().insert(0, nick + ": ");
 		} else {
 			if (mEditMessage.getText().charAt(
-						mEditMessage.getSelectionStart() - 1) != ' ') {
+					mEditMessage.getSelectionStart() - 1) != ' ') {
 				nick = " " + nick;
-						}
+			}
 			mEditMessage.getText().insert(mEditMessage.getSelectionStart(),
 					nick + " ");
 		}
@@ -684,7 +722,7 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 		if (this.conversation != null) {
 			final String msg = mEditMessage.getText().toString();
 			this.conversation.setNextMessage(msg);
-			updateChatState(this.conversation,msg);
+			updateChatState(this.conversation, msg);
 		}
 	}
 
@@ -707,7 +745,7 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 			final String msg = mEditMessage.getText().toString();
 			this.conversation.setNextMessage(msg);
 			if (this.conversation != conversation) {
-				updateChatState(this.conversation,msg);
+				updateChatState(this.conversation, msg);
 			}
 			this.conversation.trim();
 		}
@@ -753,7 +791,7 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 
 		@Override
 		public void onClick(View v) {
-			final Contact contact = conversation == null ? null :conversation.getContact();
+			final Contact contact = conversation == null ? null : conversation.getContact();
 			if (contact != null) {
 				activity.xmppConnectionService.createContact(contact);
 				activity.switchToContactDetails(contact);
@@ -776,7 +814,7 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 			intent.setAction(VerifyOTRActivity.ACTION_VERIFY_CONTACT);
 			intent.putExtra("contact", conversation.getContact().getJid().toBareJid().toString());
 			intent.putExtra("account", conversation.getAccount().getJid().toBareJid().toString());
-			intent.putExtra("mode",VerifyOTRActivity.MODE_ANSWER_QUESTION);
+			intent.putExtra("mode", VerifyOTRActivity.MODE_ANSWER_QUESTION);
 			startActivity(intent);
 		}
 	};
@@ -786,11 +824,11 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 		final Contact contact = conversation.getContact();
 		final int mode = conversation.getMode();
 		if (conversation.isBlocked()) {
-			showSnackbar(R.string.contact_blocked, R.string.unblock,this.mUnblockClickListener);
+			showSnackbar(R.string.contact_blocked, R.string.unblock, this.mUnblockClickListener);
 		} else if (!contact.showInRoster() && contact.getOption(Contact.Options.PENDING_SUBSCRIPTION_REQUEST)) {
-			showSnackbar(R.string.contact_added_you, R.string.add_back,this.mAddBackClickListener);
+			showSnackbar(R.string.contact_added_you, R.string.add_back, this.mAddBackClickListener);
 		} else if (mode == Conversation.MODE_MULTI
-				&&!conversation.getMucOptions().online()
+				&& !conversation.getMucOptions().online()
 				&& account.getStatus() == Account.State.ONLINE) {
 			switch (conversation.getMucOptions().getError()) {
 				case MucOptions.ERROR_NICK_IN_USE:
@@ -814,18 +852,18 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 				default:
 					break;
 			}
-		} else if (askForPassphraseIntent != null ) {
-			showSnackbar(R.string.openpgp_messages_found,R.string.decrypt, clickToDecryptListener);
+		} else if (askForPassphraseIntent != null) {
+			showSnackbar(R.string.openpgp_messages_found, R.string.decrypt, clickToDecryptListener);
 		} else if (mode == Conversation.MODE_SINGLE
 				&& conversation.smpRequested()) {
-			showSnackbar(R.string.smp_requested, R.string.verify,this.mAnswerSmpClickListener);
+			showSnackbar(R.string.smp_requested, R.string.verify, this.mAnswerSmpClickListener);
 		} else if (mode == Conversation.MODE_SINGLE
-				&&conversation.hasValidOtrSession()
+				&& conversation.hasValidOtrSession()
 				&& (conversation.getOtrSession().getSessionStatus() == SessionStatus.ENCRYPTED)
 				&& (!conversation.isOtrFingerprintVerified())) {
 			showSnackbar(R.string.unknown_otr_fingerprint, R.string.verify, clickToVerify);
 		} else if (conversation.isMuted()) {
-			showSnackbar(R.string.notifications_disabled, R.string.enable,this.mUnmuteClickListener);
+			showSnackbar(R.string.notifications_disabled, R.string.enable, this.mUnmuteClickListener);
 		} else {
 			hideSnackbar();
 		}
@@ -839,31 +877,16 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 			final ConversationActivity activity = (ConversationActivity) getActivity();
 			if (this.conversation != null) {
 				updateSnackBar(this.conversation);
-				final Contact contact = this.conversation.getContact();
-				if (this.conversation.isBlocked()) {
-
-				} else if (!contact.showInRoster()
-						&& contact
-						.getOption(Contact.Options.PENDING_SUBSCRIPTION_REQUEST)) {
-
-				} else if (conversation.getMode() == Conversation.MODE_SINGLE) {
-					makeFingerprintWarning();
-				} else if (!conversation.getMucOptions().online()
-						&& conversation.getAccount().getStatus() == Account.State.ONLINE) {
-
-				} else if (this.conversation.isMuted()) {
-
-				}
 				conversation.populateWithMessages(ConversationFragment.this.messageList);
 				for (final Message message : this.messageList) {
 					if (message.getEncryption() == Message.ENCRYPTION_PGP
 							&& (message.getStatus() == Message.STATUS_RECEIVED || message
-								.getStatus() >= Message.STATUS_SEND)
-							&& message.getDownloadable() == null) {
+							.getStatus() >= Message.STATUS_SEND)
+							&& message.getTransferable() == null) {
 						if (!mEncryptedMessages.contains(message)) {
 							mEncryptedMessages.add(message);
 						}
-							}
+					}
 				}
 				decryptNext();
 				updateStatusMessages();
@@ -900,6 +923,7 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 					} catch (final NoSuchElementException ignored) {
 
 					}
+					askForPassphraseIntent = null;
 					activity.xmppConnectionService.updateMessage(message);
 				}
 
@@ -925,53 +949,149 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 		updateChatMsgHint();
 	}
 
-	public void updateSendButton() {
-		Conversation c = this.conversation;
-		if (Settings.SHOW_ONLINE_STATUS && c != null
-				&& c.getAccount().getStatus() == Account.State.ONLINE) {
-			if (c.getMode() == Conversation.MODE_SINGLE) {
-				switch (c.getContact().getMostAvailableStatus()) {
+	enum SendButtonAction {TEXT, TAKE_PHOTO, SEND_LOCATION, RECORD_VOICE, CANCEL, CHOOSE_PICTURE}
+
+	private int getSendButtonImageResource(SendButtonAction action, int status) {
+		switch (action) {
+			case TEXT:
+				switch (status) {
 					case Presences.CHAT:
-						this.mSendButton
-							.setImageResource(R.drawable.ic_action_send_now_online);
-						break;
 					case Presences.ONLINE:
-						this.mSendButton
-							.setImageResource(R.drawable.ic_action_send_now_online);
-						break;
+						return R.drawable.ic_send_text_online;
 					case Presences.AWAY:
-						this.mSendButton
-							.setImageResource(R.drawable.ic_action_send_now_away);
-						break;
+						return R.drawable.ic_send_text_away;
 					case Presences.XA:
-						this.mSendButton
-							.setImageResource(R.drawable.ic_action_send_now_away);
-						break;
 					case Presences.DND:
-						this.mSendButton
-							.setImageResource(R.drawable.ic_action_send_now_dnd);
-						break;
+						return R.drawable.ic_send_text_dnd;
 					default:
-						this.mSendButton
-							.setImageResource(R.drawable.ic_action_send_now_offline);
-						break;
+						return R.drawable.ic_send_text_offline;
+				}
+			case TAKE_PHOTO:
+				switch (status) {
+					case Presences.CHAT:
+					case Presences.ONLINE:
+						return R.drawable.ic_send_photo_online;
+					case Presences.AWAY:
+						return R.drawable.ic_send_photo_away;
+					case Presences.XA:
+					case Presences.DND:
+						return R.drawable.ic_send_photo_dnd;
+					default:
+						return R.drawable.ic_send_photo_offline;
+				}
+			case RECORD_VOICE:
+				switch (status) {
+					case Presences.CHAT:
+					case Presences.ONLINE:
+						return R.drawable.ic_send_voice_online;
+					case Presences.AWAY:
+						return R.drawable.ic_send_voice_away;
+					case Presences.XA:
+					case Presences.DND:
+						return R.drawable.ic_send_voice_dnd;
+					default:
+						return R.drawable.ic_send_voice_offline;
+				}
+			case SEND_LOCATION:
+				switch (status) {
+					case Presences.CHAT:
+					case Presences.ONLINE:
+						return R.drawable.ic_send_location_online;
+					case Presences.AWAY:
+						return R.drawable.ic_send_location_away;
+					case Presences.XA:
+					case Presences.DND:
+						return R.drawable.ic_send_location_dnd;
+					default:
+						return R.drawable.ic_send_location_offline;
+				}
+			case CANCEL:
+				switch (status) {
+					case Presences.CHAT:
+					case Presences.ONLINE:
+						return R.drawable.ic_send_cancel_online;
+					case Presences.AWAY:
+						return R.drawable.ic_send_cancel_away;
+					case Presences.XA:
+					case Presences.DND:
+						return R.drawable.ic_send_cancel_dnd;
+					default:
+						return R.drawable.ic_send_cancel_offline;
 				}
-			} else if (c.getMode() == Conversation.MODE_MULTI) {
-				if (c.getMucOptions().online()) {
-					this.mSendButton
-						.setImageResource(R.drawable.ic_action_send_now_online);
+			case CHOOSE_PICTURE:
+				switch (status) {
+					case Presences.CHAT:
+					case Presences.ONLINE:
+						return R.drawable.ic_send_picture_online;
+					case Presences.AWAY:
+						return R.drawable.ic_send_picture_away;
+					case Presences.XA:
+					case Presences.DND:
+						return R.drawable.ic_send_picture_dnd;
+					default:
+						return R.drawable.ic_send_picture_offline;
+				}
+		}
+		return R.drawable.ic_send_text_offline;
+	}
+
+	public void updateSendButton() {
+		final Conversation c = this.conversation;
+		final SendButtonAction action;
+		final int status;
+		final boolean empty = this.mEditMessage == null || this.mEditMessage.getText().length() == 0;
+		final boolean conference = c.getMode() == Conversation.MODE_MULTI;
+		if (conference && !c.getAccount().httpUploadAvailable()) {
+			if (empty && c.getNextCounterpart() != null) {
+				action = SendButtonAction.CANCEL;
+			} else {
+				action = SendButtonAction.TEXT;
+			}
+		} else {
+			if (empty) {
+				if (conference && c.getNextCounterpart() != null) {
+					action = SendButtonAction.CANCEL;
 				} else {
-					this.mSendButton
-						.setImageResource(R.drawable.ic_action_send_now_offline);
+					String setting = activity.getPreferences().getString("quick_action", "recent");
+					if (!setting.equals("none") && UIHelper.receivedLocationQuestion(conversation.getLatestMessage())) {
+						setting = "location";
+					} else if (setting.equals("recent")) {
+						setting = activity.getPreferences().getString("recently_used_quick_action", "text");
+					}
+					switch (setting) {
+						case "photo":
+							action = SendButtonAction.TAKE_PHOTO;
+							break;
+						case "location":
+							action = SendButtonAction.SEND_LOCATION;
+							break;
+						case "voice":
+							action = SendButtonAction.RECORD_VOICE;
+							break;
+						case "picture":
+							action = SendButtonAction.CHOOSE_PICTURE;
+							break;
+						default:
+							action = SendButtonAction.TEXT;
+							break;
+					}
 				}
 			} else {
-				this.mSendButton
-					.setImageResource(R.drawable.ic_action_send_now_offline);
+				action = SendButtonAction.TEXT;
+			}
+		}
+		if (activity.useSendButtonToIndicateStatus() && c != null
+				&& c.getAccount().getStatus() == Account.State.ONLINE) {
+			if (c.getMode() == Conversation.MODE_SINGLE) {
+				status = c.getContact().getMostAvailableStatus();
+			} else {
+				status = c.getMucOptions().online() ? Presences.ONLINE : Presences.OFFLINE;
 			}
 		} else {
-			this.mSendButton
-				.setImageResource(R.drawable.ic_action_send_now_offline);
+			status = Presences.OFFLINE;
 		}
+		this.mSendButton.setTag(action);
+		this.mSendButton.setImageResource(getSendButtonImageResource(action, status));
 	}
 
 	protected void updateStatusMessages() {
@@ -999,12 +1119,8 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 		}
 	}
 
-	protected void makeFingerprintWarning() {
-
-	}
-
 	protected void showSnackbar(final int message, final int action,
-			final OnClickListener clickListener) {
+								final OnClickListener clickListener) {
 		snackbar.setVisibility(View.VISIBLE);
 		snackbar.setOnClickListener(null);
 		snackbarMessage.setText(message);
@@ -1036,7 +1152,7 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 
 								@Override
 								public void userInputRequried(PendingIntent pi,
-										Contact contact) {
+															  Contact contact) {
 									activity.runIntent(
 											pi,
 											ConversationActivity.REQUEST_ENCRYPT_MESSAGE);
@@ -1060,11 +1176,11 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 
 								@Override
 								public void onClick(DialogInterface dialog,
-										int which) {
+													int which) {
 									conversation
-										.setNextEncryption(Message.ENCRYPTION_NONE);
+											.setNextEncryption(Message.ENCRYPTION_NONE);
 									xmppService.databaseBackend
-										.updateConversation(conversation);
+											.updateConversation(conversation);
 									message.setEncryption(Message.ENCRYPTION_NONE);
 									xmppService.sendMessage(message);
 									messageSent();
@@ -1075,9 +1191,9 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 				if (conversation.getMucOptions().pgpKeysInUse()) {
 					if (!conversation.getMucOptions().everybodyHasKeys()) {
 						Toast warning = Toast
-							.makeText(getActivity(),
-									R.string.missing_public_keys,
-									Toast.LENGTH_LONG);
+								.makeText(getActivity(),
+										R.string.missing_public_keys,
+										Toast.LENGTH_LONG);
 						warning.setGravity(Gravity.CENTER_VERTICAL, 0, 0);
 						warning.show();
 					}
@@ -1089,12 +1205,12 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 
 								@Override
 								public void onClick(DialogInterface dialog,
-										int which) {
+													int which) {
 									conversation
-										.setNextEncryption(Message.ENCRYPTION_NONE);
+											.setNextEncryption(Message.ENCRYPTION_NONE);
 									message.setEncryption(Message.ENCRYPTION_NONE);
 									xmppService.databaseBackend
-										.updateConversation(conversation);
+											.updateConversation(conversation);
 									xmppService.sendMessage(message);
 									messageSent();
 								}
@@ -1107,7 +1223,7 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 	}
 
 	public void showNoPGPKeyDialog(boolean plural,
-			DialogInterface.OnClickListener listener) {
+								   DialogInterface.OnClickListener listener) {
 		AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
 		builder.setIconAttribute(android.R.attr.alertDialogIcon);
 		if (plural) {
@@ -1139,6 +1255,9 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 	}
 
 	public void appendText(String text) {
+		if (text == null) {
+			return;
+		}
 		String previous = this.mEditMessage.getText().toString();
 		if (previous.length() != 0 && !previous.endsWith(" ")) {
 			text = " " + text;
@@ -1162,6 +1281,7 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 		if (status == Account.State.ONLINE && conversation.setOutgoingChatState(ChatState.COMPOSING)) {
 			activity.xmppConnectionService.sendChatState(conversation);
 		}
+		updateSendButton();
 	}
 
 	@Override
@@ -1178,6 +1298,7 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 		if (status == Account.State.ONLINE && conversation.setOutgoingChatState(Config.DEFAULT_CHATSTATE)) {
 			activity.xmppConnectionService.sendChatState(conversation);
 		}
+		updateSendButton();
 	}
 
     private void changeEmojiKeyboardIcon(ImageView iconToBeChanged, int drawableResourceId){
diff --git a/src/main/java/eu/siacs/conversations/ui/EditAccountActivity.java b/src/main/java/eu/siacs/conversations/ui/EditAccountActivity.java
index 27dfc492..908c29d2 100644
--- a/src/main/java/eu/siacs/conversations/ui/EditAccountActivity.java
+++ b/src/main/java/eu/siacs/conversations/ui/EditAccountActivity.java
@@ -67,7 +67,7 @@ public class EditAccountActivity extends XmppActivity implements OnAccountUpdate
 
 		@Override
 		public void onClick(final View v) {
-			if (mAccount != null && mAccount.getStatus() == Account.State.DISABLED) {
+			if (mAccount != null && mAccount.getStatus() == Account.State.DISABLED && !accountInfoEdited()) {
 				mAccount.setOption(Account.OPTION_DISABLED, false);
 				xmppConnectionService.updateAccount(mAccount);
 				return;
@@ -123,11 +123,11 @@ public class EditAccountActivity extends XmppActivity implements OnAccountUpdate
 				mAccount.setOption(Account.OPTION_REGISTER, registerNewAccount);
 				xmppConnectionService.createAccount(mAccount);
 			}
-			if (jidToEdit != null) {
+			if (jidToEdit != null && !mAccount.isOptionSet(Account.OPTION_DISABLED)) {
 				finish();
 			} else {
 				updateSaveButton();
-				updateAccountInformation();
+				updateAccountInformation(true);
 			}
 
 		}
@@ -163,7 +163,7 @@ public class EditAccountActivity extends XmppActivity implements OnAccountUpdate
 					updateSaveButton();
 				}
 				if (mAccount != null) {
-					updateAccountInformation();
+					updateAccountInformation(false);
 				}
 			}
 		});
@@ -223,7 +223,9 @@ public class EditAccountActivity extends XmppActivity implements OnAccountUpdate
 				if (avatar != null) {
 					intent = new Intent(getApplicationContext(),
 							StartConversationActivity.class);
-					intent.putExtra("init",true);
+					if (xmppConnectionService != null && xmppConnectionService.getAccounts().size() == 1) {
+						intent.putExtra("init", true);
+					}
 				} else {
 					intent = new Intent(getApplicationContext(),
 							PublishProfilePictureActivity.class);
@@ -237,7 +239,11 @@ public class EditAccountActivity extends XmppActivity implements OnAccountUpdate
 	}
 
 	protected void updateSaveButton() {
-		if (mAccount != null && (mAccount.getStatus() == Account.State.CONNECTING || mFetchingAvatar)) {
+		if (accountInfoEdited() && jidToEdit != null) {
+			this.mSaveButton.setText(R.string.save);
+			this.mSaveButton.setEnabled(true);
+			this.mSaveButton.setTextColor(getPrimaryTextColor());
+		} else if (mAccount != null && (mAccount.getStatus() == Account.State.CONNECTING || mFetchingAvatar)) {
 			this.mSaveButton.setEnabled(false);
 			this.mSaveButton.setTextColor(getSecondaryTextColor());
 			this.mSaveButton.setText(R.string.account_status_connecting);
@@ -265,9 +271,9 @@ public class EditAccountActivity extends XmppActivity implements OnAccountUpdate
 	}
 
 	protected boolean accountInfoEdited() {
-		return (!this.mAccount.getJid().toBareJid().toString().equals(
-					this.mAccountJid.getText().toString()))
-			|| (!this.mAccount.getPassword().equals(
+		return this.mAccount != null && (!this.mAccount.getJid().toBareJid().toString().equals(
+					this.mAccountJid.getText().toString())
+			|| !this.mAccount.getPassword().equals(
 						this.mPassword.getText().toString()));
 	}
 
@@ -378,7 +384,7 @@ public class EditAccountActivity extends XmppActivity implements OnAccountUpdate
 				xmppConnectionService.getKnownHosts());
 		if (this.jidToEdit != null) {
 			this.mAccount = xmppConnectionService.findAccountByJid(jidToEdit);
-			updateAccountInformation();
+			updateAccountInformation(true);
 		} else if (this.xmppConnectionService.getAccounts().size() == 0) {
 			if (getActionBar() != null) {
 				getActionBar().setDisplayHomeAsUpEnabled(false);
@@ -413,9 +419,11 @@ public class EditAccountActivity extends XmppActivity implements OnAccountUpdate
 		return super.onOptionsItemSelected(item);
 	}
 
-	private void updateAccountInformation() {
-		this.mAccountJid.setText(this.mAccount.getJid().toBareJid().toString());
-		this.mPassword.setText(this.mAccount.getPassword());
+	private void updateAccountInformation(boolean init) {
+		if (init) {
+			this.mAccountJid.setText(this.mAccount.getJid().toBareJid().toString());
+			this.mPassword.setText(this.mAccount.getPassword());
+		}
 		if (this.jidToEdit != null) {
 			this.mAvatar.setVisibility(View.VISIBLE);
 			this.mAvatar.setImageBitmap(avatarService().get(this.mAccount, getPixel(72)));
@@ -464,7 +472,7 @@ public class EditAccountActivity extends XmppActivity implements OnAccountUpdate
 			} else {
 				this.mServerInfoSm.setText(R.string.server_info_unavailable);
 			}
-			if (features.pubsub()) {
+			if (features.pep()) {
 				this.mServerInfoPep.setText(R.string.server_info_available);
 			} else {
 				this.mServerInfoPep.setText(R.string.server_info_unavailable);
@@ -495,7 +503,9 @@ public class EditAccountActivity extends XmppActivity implements OnAccountUpdate
 		} else {
 			if (this.mAccount.errorStatus()) {
 				this.mAccountJid.setError(getString(this.mAccount.getStatus().getReadableId()));
-				this.mAccountJid.requestFocus();
+				if (init || !accountInfoEdited()) {
+					this.mAccountJid.requestFocus();
+				}
 			} else {
 				this.mAccountJid.setError(null);
 			}
diff --git a/src/main/java/eu/siacs/conversations/ui/ManageAccountActivity.java b/src/main/java/eu/siacs/conversations/ui/ManageAccountActivity.java
index b2d5ddfd..56dbc55e 100644
--- a/src/main/java/eu/siacs/conversations/ui/ManageAccountActivity.java
+++ b/src/main/java/eu/siacs/conversations/ui/ManageAccountActivity.java
@@ -168,6 +168,14 @@ public class ManageAccountActivity extends XmppActivity implements OnAccountUpda
 		}
 	}
 
+	public void onClickTglAccountState(Account account, boolean enable) {
+		if (enable) {
+			enableAccount(account);
+		} else {
+			disableAccount(account);
+		}
+	}
+
 	private void publishAvatar(Account account) {
 		Intent intent = new Intent(getApplicationContext(),
 				PublishProfilePictureActivity.class);
diff --git a/src/main/java/eu/siacs/conversations/ui/PublishProfilePictureActivity.java b/src/main/java/eu/siacs/conversations/ui/PublishProfilePictureActivity.java
index 3f72b723..4333dbdb 100644
--- a/src/main/java/eu/siacs/conversations/ui/PublishProfilePictureActivity.java
+++ b/src/main/java/eu/siacs/conversations/ui/PublishProfilePictureActivity.java
@@ -116,7 +116,9 @@ public class PublishProfilePictureActivity extends XmppActivity {
 				if (mInitialAccountSetup) {
 					Intent intent = new Intent(getApplicationContext(),
 							StartConversationActivity.class);
-					intent.putExtra("init",true);
+					if (xmppConnectionService != null && xmppConnectionService.getAccounts().size() == 1) {
+						intent.putExtra("init", true);
+					}
 					startActivity(intent);
 				}
 				finish();
@@ -163,8 +165,7 @@ public class PublishProfilePictureActivity extends XmppActivity {
             if (jid != null) {
 				this.account = xmppConnectionService.findAccountByJid(jid);
 				if (this.account.getXmppConnection() != null) {
-					this.support = this.account.getXmppConnection()
-							.getFeatures().pubsub();
+					this.support = this.account.getXmppConnection().getFeatures().pep();
 				}
 				if (this.avatarUri == null) {
 					if (this.account.getAvatar() != null
diff --git a/src/main/java/eu/siacs/conversations/ui/SettingsActivity.java b/src/main/java/eu/siacs/conversations/ui/SettingsActivity.java
index 2115b23b..f3d5d8bd 100644
--- a/src/main/java/eu/siacs/conversations/ui/SettingsActivity.java
+++ b/src/main/java/eu/siacs/conversations/ui/SettingsActivity.java
@@ -1,18 +1,30 @@
 package eu.siacs.conversations.ui;
 
+import java.security.KeyStoreException;
 import java.util.ArrayList;
 import java.util.Arrays;
+import java.util.Collections;
 import java.util.Locale;
 
 import de.tzur.conversations.Settings;
+import de.duenndns.ssl.MemorizingTrustManager;
+
+import eu.siacs.conversations.R;
 import eu.siacs.conversations.entities.Account;
+import eu.siacs.conversations.xmpp.XmppConnection;
 
+import android.app.AlertDialog;
+import android.app.Fragment;
+import android.app.FragmentManager;
+import android.content.DialogInterface;
 import android.content.SharedPreferences;
 import android.content.SharedPreferences.OnSharedPreferenceChangeListener;
 import android.os.Build;
 import android.os.Bundle;
 import android.preference.ListPreference;
+import android.preference.Preference;
 import android.preference.PreferenceManager;
+import android.widget.Toast;
 
 public class SettingsActivity extends XmppActivity implements
 		OnSharedPreferenceChangeListener {
@@ -21,9 +33,12 @@ public class SettingsActivity extends XmppActivity implements
 	@Override
 	protected void onCreate(Bundle savedInstanceState) {
 		super.onCreate(savedInstanceState);
-		mSettingsFragment = new SettingsFragment();
-		getFragmentManager().beginTransaction()
-				.replace(android.R.id.content, mSettingsFragment).commit();
+		FragmentManager fm = getFragmentManager();
+		mSettingsFragment = (SettingsFragment) fm.findFragmentById(android.R.id.content);
+		if (mSettingsFragment == null || !mSettingsFragment.getClass().equals(SettingsFragment.class)) {
+			mSettingsFragment = new SettingsFragment();
+			fm.beginTransaction().replace(android.R.id.content, mSettingsFragment).commit();
+		}
 	}
 
 	@Override
@@ -34,19 +49,78 @@ public class SettingsActivity extends XmppActivity implements
 	@Override
 	public void onStart() {
 		super.onStart();
-		PreferenceManager.getDefaultSharedPreferences(this)
-				.registerOnSharedPreferenceChangeListener(this);
-		ListPreference resources = (ListPreference) mSettingsFragment
-				.findPreference("resource");
+		PreferenceManager.getDefaultSharedPreferences(this).registerOnSharedPreferenceChangeListener(this);
+		ListPreference resources = (ListPreference) mSettingsFragment.findPreference("resource");
 		if (resources != null) {
-			ArrayList<CharSequence> entries = new ArrayList<CharSequence>(
-					Arrays.asList(resources.getEntries()));
-			entries.add(0, Build.MODEL);
-			resources.setEntries(entries.toArray(new CharSequence[entries
-					.size()]));
-			resources.setEntryValues(entries.toArray(new CharSequence[entries
-					.size()]));
+			ArrayList<CharSequence> entries = new ArrayList<>(Arrays.asList(resources.getEntries()));
+			if (!entries.contains(Build.MODEL)) {
+				entries.add(0, Build.MODEL);
+				resources.setEntries(entries.toArray(new CharSequence[entries.size()]));
+				resources.setEntryValues(entries.toArray(new CharSequence[entries.size()]));
+			}
 		}
+
+		final Preference removeCertsPreference = mSettingsFragment.findPreference("remove_trusted_certificates");
+		removeCertsPreference.setOnPreferenceClickListener(new Preference.OnPreferenceClickListener() {
+			@Override
+			public boolean onPreferenceClick(Preference preference) {
+				final MemorizingTrustManager mtm = xmppConnectionService.getMemorizingTrustManager();
+				final ArrayList<String> aliases = Collections.list(mtm.getCertificates());
+				if (aliases.size() == 0) {
+					displayToast(getString(R.string.toast_no_trusted_certs));
+					return true;
+				}
+				final ArrayList selectedItems = new ArrayList<Integer>();
+				final AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(SettingsActivity.this);
+				dialogBuilder.setTitle(getResources().getString(R.string.dialog_manage_certs_title));
+				dialogBuilder.setMultiChoiceItems(aliases.toArray(new CharSequence[aliases.size()]), null,
+						new DialogInterface.OnMultiChoiceClickListener() {
+							@Override
+							public void onClick(DialogInterface dialog, int indexSelected,
+												boolean isChecked) {
+								if (isChecked) {
+									selectedItems.add(indexSelected);
+								} else if (selectedItems.contains(indexSelected)) {
+									selectedItems.remove(Integer.valueOf(indexSelected));
+								}
+								if (selectedItems.size() > 0)
+									((AlertDialog) dialog).getButton(DialogInterface.BUTTON_POSITIVE).setEnabled(true);
+								else {
+									((AlertDialog) dialog).getButton(DialogInterface.BUTTON_POSITIVE).setEnabled(false);
+								}
+							}
+						});
+
+				dialogBuilder.setPositiveButton(
+						getResources().getString(R.string.dialog_manage_certs_positivebutton), new DialogInterface.OnClickListener() {
+							@Override
+							public void onClick(DialogInterface dialog, int which) {
+								int count = selectedItems.size();
+								if (count > 0) {
+									for (int i = 0; i < count; i++) {
+										try {
+											Integer item = Integer.valueOf(selectedItems.get(i).toString());
+											String alias = aliases.get(item);
+											mtm.deleteCertificate(alias);
+										} catch (KeyStoreException e) {
+											e.printStackTrace();
+											displayToast("Error: " + e.getLocalizedMessage());
+										}
+									}
+									if (xmppConnectionServiceBound) {
+										reconnectAccounts();
+									}
+									displayToast(getResources().getQuantityString(R.plurals.toast_delete_certificates, count, count));
+								}
+							}
+						});
+				dialogBuilder.setNegativeButton(getResources().getString(R.string.dialog_manage_certs_negativebutton), null);
+				AlertDialog removeCertsDialog = dialogBuilder.create();
+				removeCertsDialog.show();
+				removeCertsDialog.getButton(AlertDialog.BUTTON_POSITIVE).setEnabled(false);
+				return true;
+			}
+		});
 	}
 
 	@Override
@@ -69,6 +143,10 @@ public class SettingsActivity extends XmppActivity implements
                     for (Account account : xmppConnectionService.getAccounts()) {
                         account.setResource(resource);
                         if (!account.isOptionSet(Account.OPTION_DISABLED)) {
+							XmppConnection connection = account.getXmppConnection();
+							if (connection != null) {
+								connection.resetStreamId();
+							}
                             xmppConnectionService.reconnectAccountInBackground(account);
                         }
                     }
@@ -77,7 +155,7 @@ public class SettingsActivity extends XmppActivity implements
             case "keep_foreground_service":
                 xmppConnectionService.toggleForegroundService();
                 break;
-			case "confirm_messages_list":
+			case "confirm_messages":
 				if (xmppConnectionServiceBound) {
 					for (Account account : xmppConnectionService.getAccounts()) {
 						if (!account.isOptionSet(Account.OPTION_DISABLED)) {
@@ -86,7 +164,28 @@ public class SettingsActivity extends XmppActivity implements
 					}
 				}
 				break;
-        }
+			case "dont_trust_system_cas":
+			xmppConnectionService.updateMemorizingTrustmanager();
+			reconnectAccounts();
+				break;
+		}
+	}
+
+	private void displayToast(final String msg) {
+		runOnUiThread(new Runnable() {
+			@Override
+			public void run() {
+				Toast.makeText(SettingsActivity.this, msg, Toast.LENGTH_LONG).show();
+			}
+		});
+	}
+
+	private void reconnectAccounts() {
+		for (Account account : xmppConnectionService.getAccounts()) {
+			if (!account.isOptionSet(Account.OPTION_DISABLED)) {
+				xmppConnectionService.reconnectAccountInBackground(account);
+			}
+		}
 	}
 
 }
diff --git a/src/main/java/eu/siacs/conversations/ui/ShareWithActivity.java b/src/main/java/eu/siacs/conversations/ui/ShareWithActivity.java
index 6be238dc..351f1dfc 100644
--- a/src/main/java/eu/siacs/conversations/ui/ShareWithActivity.java
+++ b/src/main/java/eu/siacs/conversations/ui/ShareWithActivity.java
@@ -4,7 +4,6 @@ import android.app.PendingIntent;
 import android.content.Intent;
 import android.net.Uri;
 import android.os.Bundle;
-import android.util.Log;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
@@ -13,11 +12,9 @@ import android.widget.AdapterView.OnItemClickListener;
 import android.widget.ListView;
 import android.widget.Toast;
 
-import java.io.UnsupportedEncodingException;
 import java.net.URLConnection;
-import java.net.URLDecoder;
-import java.nio.charset.UnsupportedCharsetException;
 import java.util.ArrayList;
+import java.util.Iterator;
 import java.util.List;
 
 import eu.siacs.conversations.Config;
@@ -32,7 +29,7 @@ import eu.siacs.conversations.xmpp.jid.Jid;
 public class ShareWithActivity extends XmppActivity {
 
 	private class Share {
-		public Uri uri;
+		public List<Uri> uris = new ArrayList<>();
 		public boolean image;
 		public String account;
 		public String contact;
@@ -65,18 +62,17 @@ public class ShareWithActivity extends XmppActivity {
 		}
 	};
 
-	protected void onActivityResult(int requestCode, int resultCode,
-			final Intent data) {
+	protected void onActivityResult(int requestCode, int resultCode, final Intent data) {
 		super.onActivityResult(requestCode, resultCode, data);
 		if (requestCode == REQUEST_START_NEW_CONVERSATION
 				&& resultCode == RESULT_OK) {
 			share.contact = data.getStringExtra("contact");
 			share.account = data.getStringExtra("account");
-			Log.d(Config.LOGTAG, "contact: " + share.contact + " account:"
-					+ share.account);
 		}
-		if (xmppConnectionServiceBound && share != null
-				&& share.contact != null && share.account != null) {
+		if (xmppConnectionServiceBound
+				&& share != null
+				&& share.contact != null
+				&& share.account != null) {
 			share();
 		}
 	}
@@ -100,13 +96,8 @@ public class ShareWithActivity extends XmppActivity {
 		mListView.setOnItemClickListener(new OnItemClickListener() {
 
 			@Override
-			public void onItemClick(AdapterView<?> arg0, View arg1,
-					int position, long arg3) {
-				Conversation conversation = mConversations.get(position);
-				if (conversation.getMode() == Conversation.MODE_SINGLE
-						|| share.uri == null) {
-					share(mConversations.get(position));
-				}
+			public void onItemClick(AdapterView<?> arg0, View arg1, int position, long arg3) {
+				share(mConversations.get(position));
 			}
 		});
 
@@ -122,29 +113,42 @@ public class ShareWithActivity extends XmppActivity {
 	@Override
 	public boolean onOptionsItemSelected(final MenuItem item) {
 		switch (item.getItemId()) {
-		case R.id.action_add:
-			final Intent intent = new Intent(getApplicationContext(),
-					ChooseContactActivity.class);
-			startActivityForResult(intent, REQUEST_START_NEW_CONVERSATION);
-			return true;
+			case R.id.action_add:
+				final Intent intent = new Intent(getApplicationContext(), ChooseContactActivity.class);
+				startActivityForResult(intent, REQUEST_START_NEW_CONVERSATION);
+				return true;
 		}
 		return super.onOptionsItemSelected(item);
 	}
 
 	@Override
 	public void onStart() {
-		final String type = getIntent().getType();
-		final Uri uri = getIntent().getParcelableExtra(Intent.EXTRA_STREAM);
-		if (type != null && uri != null && !type.equalsIgnoreCase("text/plain")) {
-			this.share.uri = uri;
-			this.share.image = type.startsWith("image/") || isImage(uri);
-		} else {
-			this.share.text = getIntent().getStringExtra(Intent.EXTRA_TEXT);
+		super.onStart();
+		Intent intent = getIntent();
+		if (intent == null) {
+			return;
+		}
+		final String type = intent.getType();
+		if (Intent.ACTION_SEND.equals(intent.getAction())) {
+			final Uri uri = getIntent().getParcelableExtra(Intent.EXTRA_STREAM);
+			if (type != null && uri != null && !type.equalsIgnoreCase("text/plain")) {
+				this.share.uris.add(uri);
+				this.share.image = type.startsWith("image/") || isImage(uri);
+			} else {
+				this.share.text = getIntent().getStringExtra(Intent.EXTRA_TEXT);
+			}
+		} else if (Intent.ACTION_SEND_MULTIPLE.equals(intent.getAction())) {
+			this.share.image = type != null && type.startsWith("image/");
+			if (!this.share.image) {
+				return;
+			}
+
+			this.share.uris = intent.getParcelableArrayListExtra(Intent.EXTRA_STREAM);
 		}
 		if (xmppConnectionServiceBound) {
-			xmppConnectionService.populateWithOrderedConversations(mConversations, this.share.uri == null);
+			xmppConnectionService.populateWithOrderedConversations(mConversations, this.share.uris.size() == 0);
 		}
-		super.onStart();
+
 	}
 
 	protected boolean isImage(Uri uri) {
@@ -164,54 +168,60 @@ public class ShareWithActivity extends XmppActivity {
 			return;
 		}
 		xmppConnectionService.populateWithOrderedConversations(mConversations,
-				this.share != null && this.share.uri == null);
+				this.share != null && this.share.uris.size() == 0);
 	}
 
 	private void share() {
-        Account account;
-        try {
-            account = xmppConnectionService.findAccountByJid(Jid.fromString(share.account));
-        } catch (final InvalidJidException e) {
-            account = null;
-        }
-        if (account == null) {
+		Account account;
+		try {
+			account = xmppConnectionService.findAccountByJid(Jid.fromString(share.account));
+		} catch (final InvalidJidException e) {
+			account = null;
+		}
+		if (account == null) {
+			return;
+		}
+		final Conversation conversation;
+		try {
+			conversation = xmppConnectionService
+					.findOrCreateConversation(account, Jid.fromString(share.contact), false);
+		} catch (final InvalidJidException e) {
 			return;
 		}
-        final Conversation conversation;
-        try {
-            conversation = xmppConnectionService
-                    .findOrCreateConversation(account, Jid.fromString(share.contact), false);
-        } catch (final InvalidJidException e) {
-            return;
-        }
-        share(conversation);
+		share(conversation);
 	}
 
 	private void share(final Conversation conversation) {
-		if (share.uri != null) {
-			selectPresence(conversation, new OnPresenceSelected() {
+		if (share.uris.size() != 0) {
+			OnPresenceSelected callback = new OnPresenceSelected() {
 				@Override
 				public void onPresenceSelected() {
 					if (share.image) {
 						Toast.makeText(getApplicationContext(),
 								getText(R.string.preparing_image),
 								Toast.LENGTH_LONG).show();
-						ShareWithActivity.this.xmppConnectionService
-							.attachImageToConversation(conversation, share.uri,
-									attachFileCallback);
+						for (Iterator<Uri> i = share.uris.iterator(); i.hasNext(); i.remove()) {
+							ShareWithActivity.this.xmppConnectionService
+									.attachImageToConversation(conversation, i.next(),
+											attachFileCallback);
+						}
 					} else {
 						Toast.makeText(getApplicationContext(),
 								getText(R.string.preparing_file),
 								Toast.LENGTH_LONG).show();
 						ShareWithActivity.this.xmppConnectionService
-							.attachFileToConversation(conversation, share.uri,
-									attachFileCallback);
+								.attachFileToConversation(conversation, share.uris.get(0),
+										attachFileCallback);
 					}
 					switchToConversation(conversation, null, true);
 					finish();
 				}
-			});
-
+			};
+			if (conversation.getAccount().httpUploadAvailable()) {
+				callback.onPresenceSelected();
+			} else {
+				selectPresence(conversation, callback);
+			}
 		} else {
 			switchToConversation(conversation, this.share.text, true);
 			finish();
diff --git a/src/main/java/eu/siacs/conversations/ui/StartConversationActivity.java b/src/main/java/eu/siacs/conversations/ui/StartConversationActivity.java
index a556b8b7..68e77af4 100644
--- a/src/main/java/eu/siacs/conversations/ui/StartConversationActivity.java
+++ b/src/main/java/eu/siacs/conversations/ui/StartConversationActivity.java
@@ -42,6 +42,7 @@ import android.widget.Checkable;
 import android.widget.EditText;
 import android.widget.ListView;
 import android.widget.Spinner;
+import android.widget.Toast;
 
 import com.google.zxing.integration.android.IntentIntegrator;
 import com.google.zxing.integration.android.IntentResult;
@@ -65,6 +66,7 @@ import eu.siacs.conversations.ui.adapter.KnownHostsAdapter;
 import eu.siacs.conversations.ui.adapter.ListItemAdapter;
 import eu.siacs.conversations.utils.XmppUri;
 import eu.siacs.conversations.xmpp.OnUpdateBlocklist;
+import eu.siacs.conversations.xmpp.XmppConnection;
 import eu.siacs.conversations.xmpp.jid.InvalidJidException;
 import eu.siacs.conversations.xmpp.jid.Jid;
 
@@ -262,9 +264,12 @@ public class StartConversationActivity extends XmppActivity implements OnRosterU
 
 	protected void openConversationForBookmark(int position) {
 		Bookmark bookmark = (Bookmark) conferences.get(position);
-		Conversation conversation = xmppConnectionService
-			.findOrCreateConversation(bookmark.getAccount(),
-					bookmark.getJid(), true);
+		Jid jid = bookmark.getJid();
+		if (jid == null) {
+			Toast.makeText(this,R.string.invalid_jid,Toast.LENGTH_SHORT).show();
+			return;
+		}
+		Conversation conversation = xmppConnectionService.findOrCreateConversation(bookmark.getAccount(),jid, true);
 		conversation.setBookmark(bookmark);
 		if (!conversation.getMucOptions().online()) {
 			xmppConnectionService.joinMuc(conversation);
@@ -757,14 +762,16 @@ public class StartConversationActivity extends XmppActivity implements OnRosterU
 			} else {
 				activity.contact_context_id = acmi.position;
 				final Blockable contact = (Contact) activity.contacts.get(acmi.position);
-
 				final MenuItem blockUnblockItem = menu.findItem(R.id.context_contact_block_unblock);
-				if (blockUnblockItem != null) {
+				XmppConnection xmpp = contact.getAccount().getXmppConnection();
+				if (xmpp != null && xmpp.getFeatures().blocking()) {
 					if (contact.isBlocked()) {
 						blockUnblockItem.setTitle(R.string.unblock_contact);
 					} else {
 						blockUnblockItem.setTitle(R.string.block_contact);
 					}
+				} else {
+					blockUnblockItem.setVisible(false);
 				}
 			}
 		}
diff --git a/src/main/java/eu/siacs/conversations/ui/XmppActivity.java b/src/main/java/eu/siacs/conversations/ui/XmppActivity.java
index 62f62b9a..4157035b 100644
--- a/src/main/java/eu/siacs/conversations/ui/XmppActivity.java
+++ b/src/main/java/eu/siacs/conversations/ui/XmppActivity.java
@@ -91,6 +91,7 @@ public abstract class XmppActivity extends Activity {
 
 	protected int mPrimaryTextColor;
 	protected int mSecondaryTextColor;
+	protected int mPrimaryBackgroundColor;
 	protected int mSecondaryBackgroundColor;
 	protected int mColorRed;
 	protected int mColorOrange;
@@ -113,6 +114,8 @@ public abstract class XmppActivity extends Activity {
 		}
 	};
 
+	protected ConferenceInvite mPendingConferenceInvite = null;
+
 
 	protected void refreshUi() {
 		final long diff = SystemClock.elapsedRealtime() - mLastUiRefresh;
@@ -282,6 +285,9 @@ public abstract class XmppActivity extends Activity {
 		if (this instanceof OnUpdateBlocklist) {
 			this.xmppConnectionService.setOnUpdateBlocklistListener((OnUpdateBlocklist) this);
 		}
+		if (this instanceof XmppConnectionService.OnShowErrorToast) {
+			this.xmppConnectionService.setOnShowErrorToastListener((XmppConnectionService.OnShowErrorToast) this);
+		}
 	}
 
 	protected void unregisterListeners() {
@@ -300,6 +306,9 @@ public abstract class XmppActivity extends Activity {
 		if (this instanceof OnUpdateBlocklist) {
 			this.xmppConnectionService.removeOnUpdateBlocklistListener();
 		}
+		if (this instanceof XmppConnectionService.OnShowErrorToast) {
+			this.xmppConnectionService.removeOnShowErrorToastListener();
+		}
 	}
 
 	@Override
@@ -326,13 +335,14 @@ public abstract class XmppActivity extends Activity {
 		super.onCreate(savedInstanceState);
 		metrics = getResources().getDisplayMetrics();
 		ExceptionHelper.init(getApplicationContext());
-		mPrimaryTextColor = getResources().getColor(R.color.primarytext);
-		mSecondaryTextColor = getResources().getColor(R.color.secondarytext);
-		mColorRed = getResources().getColor(R.color.red);
-		mColorOrange = getResources().getColor(R.color.orange);
-		mColorGreen = getResources().getColor(R.color.green);
-		mPrimaryColor = getResources().getColor(R.color.primary);
-		mSecondaryBackgroundColor = getResources().getColor(R.color.secondarybackground);
+		mPrimaryTextColor = getResources().getColor(R.color.black87);
+		mSecondaryTextColor = getResources().getColor(R.color.black54);
+		mColorRed = getResources().getColor(R.color.red500);
+		mColorOrange = getResources().getColor(R.color.orange500);
+		mColorGreen = getResources().getColor(R.color.green500);
+		mPrimaryColor = getResources().getColor(R.color.green500);
+		mPrimaryBackgroundColor = getResources().getColor(R.color.grey50);
+		mSecondaryBackgroundColor = getResources().getColor(R.color.grey200);
 		this.mTheme = findTheme();
 		setTheme(this.mTheme);
 		this.mUsingEnterKey = usingEnterKey();
@@ -369,7 +379,7 @@ public abstract class XmppActivity extends Activity {
 	}
 
 	public void highlightInMuc(Conversation conversation, String nick) {
-		switchToConversation(conversation,null,nick,false);
+		switchToConversation(conversation, null, nick, false);
 	}
 
 	private void switchToConversation(Conversation conversation, String text, String nick, boolean newTask) {
@@ -437,7 +447,7 @@ public abstract class XmppActivity extends Activity {
 
 					@Override
 					public void userInputRequried(PendingIntent pi,
-							Account account) {
+												  Account account) {
 						try {
 							startIntentSenderForResult(pi.getIntentSender(),
 									REQUEST_ANNOUNCE_PGP, null, 0, 0, 0);
@@ -447,14 +457,11 @@ public abstract class XmppActivity extends Activity {
 
 					@Override
 					public void success(Account account) {
-						xmppConnectionService.databaseBackend
-							.updateAccount(account);
+						xmppConnectionService.databaseBackend.updateAccount(account);
 						xmppConnectionService.sendPresence(account);
 						if (conversation != null) {
-							conversation
-								.setNextEncryption(Message.ENCRYPTION_PGP);
-							xmppConnectionService.databaseBackend
-								.updateConversation(conversation);
+							conversation.setNextEncryption(Message.ENCRYPTION_PGP);
+							xmppConnectionService.databaseBackend.updateConversation(conversation);
 						}
 					}
 
@@ -667,32 +674,11 @@ public abstract class XmppActivity extends Activity {
 	protected void onActivityResult(int requestCode, int resultCode,
 			final Intent data) {
 		super.onActivityResult(requestCode, resultCode, data);
-		if (requestCode == REQUEST_INVITE_TO_CONVERSATION
-				&& resultCode == RESULT_OK) {
-			try {
-				String conversationUuid = data.getStringExtra("conversation");
-				Conversation conversation = xmppConnectionService
-					.findConversationByUuid(conversationUuid);
-				List<Jid> jids = new ArrayList<Jid>();
-				if (data.getBooleanExtra("multiple", false)) {
-					String[] toAdd = data.getStringArrayExtra("contacts");
-					for (String item : toAdd) {
-						jids.add(Jid.fromString(item));
-					}
-				} else {
-					jids.add(Jid.fromString(data.getStringExtra("contact")));
-				}
-
-				if (conversation.getMode() == Conversation.MODE_MULTI) {
-					for (Jid jid : jids) {
-						xmppConnectionService.invite(conversation, jid);
-					}
-				} else {
-					jids.add(conversation.getJid().toBareJid());
-					xmppConnectionService.createAdhocConference(conversation.getAccount(), jids, adhocCallback);
-				}
-			} catch (final InvalidJidException ignored) {
-
+		if (requestCode == REQUEST_INVITE_TO_CONVERSATION && resultCode == RESULT_OK) {
+			mPendingConferenceInvite = ConferenceInvite.parse(data);
+			if (xmppConnectionServiceBound && mPendingConferenceInvite != null) {
+				mPendingConferenceInvite.execute(this);
+				mPendingConferenceInvite = null;
 			}
 		}
 	}
@@ -737,14 +723,14 @@ public abstract class XmppActivity extends Activity {
 		return this.mColorRed;
 	}
 
-	public int getPrimaryColor() {
-		return this.mPrimaryColor;
-	}
-
 	public int getOnlineColor() {
 		return this.mColorGreen;
 	}
-	
+
+	public int getPrimaryBackgroundColor() {
+		return this.mPrimaryBackgroundColor;
+	}
+
 	public int getSecondaryBackgroundColor() {
 		return this.mSecondaryBackgroundColor;
 	}
@@ -853,6 +839,48 @@ public abstract class XmppActivity extends Activity {
 		}
 	}
 
+	public static class ConferenceInvite {
+		private String uuid;
+		private List<Jid> jids = new ArrayList<>();
+
+		public static ConferenceInvite parse(Intent data) {
+			ConferenceInvite invite = new ConferenceInvite();
+			invite.uuid = data.getStringExtra("conversation");
+			if (invite.uuid == null) {
+				return null;
+			}
+			try {
+				if (data.getBooleanExtra("multiple", false)) {
+					String[] toAdd = data.getStringArrayExtra("contacts");
+					for (String item : toAdd) {
+						invite.jids.add(Jid.fromString(item));
+					}
+				} else {
+					invite.jids.add(Jid.fromString(data.getStringExtra("contact")));
+				}
+			} catch (final InvalidJidException ignored) {
+				return null;
+			}
+			return invite;
+		}
+
+		public void execute(XmppActivity activity) {
+			XmppConnectionService service = activity.xmppConnectionService;
+			Conversation conversation = service.findConversationByUuid(this.uuid);
+			if (conversation == null) {
+				return;
+			}
+			if (conversation.getMode() == Conversation.MODE_MULTI) {
+				for (Jid jid : jids) {
+					service.invite(conversation, jid);
+				}
+			} else {
+				jids.add(conversation.getJid().toBareJid());
+				service.createAdhocConference(conversation.getAccount(), jids, activity.adhocCallback);
+			}
+		}
+	}
+
 	public AvatarService avatarService() {
 		return xmppConnectionService.getAvatarService();
 	}
diff --git a/src/main/java/eu/siacs/conversations/ui/adapter/AccountAdapter.java b/src/main/java/eu/siacs/conversations/ui/adapter/AccountAdapter.java
index 29730914..782a1231 100644
--- a/src/main/java/eu/siacs/conversations/ui/adapter/AccountAdapter.java
+++ b/src/main/java/eu/siacs/conversations/ui/adapter/AccountAdapter.java
@@ -5,13 +5,16 @@ import java.util.List;
 import eu.siacs.conversations.R;
 import eu.siacs.conversations.entities.Account;
 import eu.siacs.conversations.ui.XmppActivity;
+import eu.siacs.conversations.ui.ManageAccountActivity;
 import android.content.Context;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.ArrayAdapter;
+import android.widget.CompoundButton;
 import android.widget.ImageView;
 import android.widget.TextView;
+import android.widget.Switch;
 
 public class AccountAdapter extends ArrayAdapter<Account> {
 
@@ -24,7 +27,7 @@ public class AccountAdapter extends ArrayAdapter<Account> {
 
 	@Override
 	public View getView(int position, View view, ViewGroup parent) {
-		Account account = getItem(position);
+		final Account account = getItem(position);
 		if (view == null) {
 			LayoutInflater inflater = (LayoutInflater) getContext()
 					.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
@@ -34,21 +37,32 @@ public class AccountAdapter extends ArrayAdapter<Account> {
 		jid.setText(account.getJid().toBareJid().toString());
 		TextView statusView = (TextView) view.findViewById(R.id.account_status);
 		ImageView imageView = (ImageView) view.findViewById(R.id.account_image);
-		imageView.setImageBitmap(activity.avatarService().get(account,
-				activity.getPixel(48)));
-        statusView.setText(getContext().getString(account.getStatus().getReadableId()));
-        switch (account.getStatus()) {
-            case ONLINE:
-                statusView.setTextColor(activity.getOnlineColor());
-                break;
-            case DISABLED:
-            case CONNECTING:
-                statusView.setTextColor(activity.getSecondaryTextColor());
-                break;
-            default:
-                statusView.setTextColor(activity.getWarningTextColor());
-                break;
-        }
+		imageView.setImageBitmap(activity.avatarService().get(account, activity.getPixel(48)));
+		statusView.setText(getContext().getString(account.getStatus().getReadableId()));
+		switch (account.getStatus()) {
+			case ONLINE:
+				statusView.setTextColor(activity.getOnlineColor());
+				break;
+			case DISABLED:
+			case CONNECTING:
+				statusView.setTextColor(activity.getSecondaryTextColor());
+				break;
+			default:
+				statusView.setTextColor(activity.getWarningTextColor());
+				break;
+		}
+		final Switch tglAccountState = (Switch) view.findViewById(R.id.tgl_account_status);
+		final boolean isDisabled = (account.getStatus() == Account.State.DISABLED);
+		tglAccountState.setOnCheckedChangeListener(null);
+		tglAccountState.setChecked(!isDisabled);
+		tglAccountState.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
+			@Override
+			public void onCheckedChanged(CompoundButton compoundButton, boolean b) {
+				if (b == isDisabled && activity instanceof ManageAccountActivity) {
+					((ManageAccountActivity) activity).onClickTglAccountState(account,b);
+				}
+			}
+		});
 		return view;
 	}
 }
diff --git a/src/main/java/eu/siacs/conversations/ui/adapter/ConversationAdapter.java b/src/main/java/eu/siacs/conversations/ui/adapter/ConversationAdapter.java
index b6f88356..c42dd305 100644
--- a/src/main/java/eu/siacs/conversations/ui/adapter/ConversationAdapter.java
+++ b/src/main/java/eu/siacs/conversations/ui/adapter/ConversationAdapter.java
@@ -3,7 +3,6 @@ package eu.siacs.conversations.ui.adapter;
 import android.content.Context;
 import android.content.res.Resources;
 import android.graphics.Bitmap;
-import android.graphics.Color;
 import android.graphics.Typeface;
 import android.graphics.drawable.BitmapDrawable;
 import android.graphics.drawable.Drawable;
@@ -25,7 +24,7 @@ import eu.siacs.conversations.Config;
 import eu.siacs.conversations.R;
 import eu.siacs.conversations.entities.Account;
 import eu.siacs.conversations.entities.Conversation;
-import eu.siacs.conversations.entities.Downloadable;
+import eu.siacs.conversations.entities.Transferable;
 import eu.siacs.conversations.entities.Message;
 import eu.siacs.conversations.entities.Presences;
 import eu.siacs.conversations.ui.ConversationActivity;
@@ -63,17 +62,10 @@ public class ConversationAdapter extends ArrayAdapter<Conversation> {
 		}
 		Conversation conversation = getItem(position);
 		if (this.activity instanceof ConversationActivity) {
-			ConversationActivity activity = (ConversationActivity) this.activity;
-			if (!activity.isConversationsOverviewHideable()) {
-				if (conversation == activity.getSelectedConversation()) {
-					view.setBackgroundColor(activity
-							.getSecondaryBackgroundColor());
-				} else {
-					view.setBackgroundColor(Color.TRANSPARENT);
-				}
-			} else {
-				view.setBackgroundColor(Color.TRANSPARENT);
-			}
+			View swipeableItem = view.findViewById(R.id.swipeable_item);
+			ConversationActivity a = (ConversationActivity) this.activity;
+			int c = !a.isConversationsOverviewHideable() && conversation == a.getSelectedConversation() ? a.getSecondaryBackgroundColor() : a.getPrimaryBackgroundColor();
+			swipeableItem.setBackgroundColor(c);
 		}
 		TextView convName = (TextView) view.findViewById(R.id.conversation_name);
 		if (conversation.getMode() == Conversation.MODE_SINGLE || activity.useSubjectToIdentifyConference()) {
@@ -117,9 +109,9 @@ public class ConversationAdapter extends ArrayAdapter<Conversation> {
 			convName.setTypeface(null, Typeface.NORMAL);
 		}
 
-		if (message.getImageParams().width > 0
-				&& (message.getDownloadable() == null
-				|| message.getDownloadable().getStatus() != Downloadable.STATUS_DELETED)) {
+		if (message.getFileParams().width > 0
+				&& (message.getTransferable() == null
+				|| message.getTransferable().getStatus() != Transferable.STATUS_DELETED)) {
 			mLastMessage.setVisibility(View.GONE);
 			imagePreview.setVisibility(View.VISIBLE);
 			activity.loadBitmap(message, imagePreview);
diff --git a/src/main/java/eu/siacs/conversations/ui/adapter/ListItemAdapter.java b/src/main/java/eu/siacs/conversations/ui/adapter/ListItemAdapter.java
index 10500bfc..4187ec60 100644
--- a/src/main/java/eu/siacs/conversations/ui/adapter/ListItemAdapter.java
+++ b/src/main/java/eu/siacs/conversations/ui/adapter/ListItemAdapter.java
@@ -4,6 +4,7 @@ import java.lang.ref.WeakReference;
 import java.util.List;
 import java.util.concurrent.RejectedExecutionException;
 
+import de.tzur.conversations.Settings;
 import eu.siacs.conversations.R;
 import eu.siacs.conversations.entities.ListItem;
 import eu.siacs.conversations.ui.XmppActivity;
diff --git a/src/main/java/eu/siacs/conversations/ui/adapter/MessageAdapter.java b/src/main/java/eu/siacs/conversations/ui/adapter/MessageAdapter.java
index 933ca1f8..b7ac3092 100644
--- a/src/main/java/eu/siacs/conversations/ui/adapter/MessageAdapter.java
+++ b/src/main/java/eu/siacs/conversations/ui/adapter/MessageAdapter.java
@@ -8,10 +8,11 @@ import android.net.Uri;
 import android.preference.PreferenceManager;
 import android.text.Spannable;
 import android.text.SpannableString;
+import android.text.Spanned;
 import android.text.style.ForegroundColorSpan;
+import android.text.style.RelativeSizeSpan;
 import android.text.style.StyleSpan;
 import android.util.DisplayMetrics;
-import android.util.Log;
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.view.View.OnLongClickListener;
@@ -31,10 +32,10 @@ import eu.siacs.conversations.R;
 import eu.siacs.conversations.entities.Account;
 import eu.siacs.conversations.entities.Contact;
 import eu.siacs.conversations.entities.Conversation;
-import eu.siacs.conversations.entities.Downloadable;
+import eu.siacs.conversations.entities.Transferable;
 import eu.siacs.conversations.entities.DownloadableFile;
 import eu.siacs.conversations.entities.Message;
-import eu.siacs.conversations.entities.Message.ImageParams;
+import eu.siacs.conversations.entities.Message.FileParams;
 import eu.siacs.conversations.ui.ConversationActivity;
 import eu.siacs.conversations.utils.GeoHelper;
 import eu.siacs.conversations.utils.UIHelper;
@@ -45,7 +46,6 @@ public class MessageAdapter extends ArrayAdapter<Message> {
 	private static final int SENT = 0;
 	private static final int RECEIVED = 1;
 	private static final int STATUS = 2;
-	private static final int NULL = 3;
 
 	private ConversationActivity activity;
 
@@ -80,14 +80,12 @@ public class MessageAdapter extends ArrayAdapter<Message> {
 
 	@Override
 	public int getViewTypeCount() {
-		return 4;
+		return 3;
 	}
 
 	@Override
 	public int getItemViewType(int position) {
-		if (getItem(position).wasMergedIntoPrevious()) {
-			return NULL;
-		} else if (getItem(position).getType() == Message.TYPE_STATUS) {
+		if (getItem(position).getType() == Message.TYPE_STATUS) {
 			return STATUS;
 		} else if (getItem(position).getStatus() <= Message.STATUS_RECEIVED) {
 			return RECEIVED;
@@ -105,14 +103,14 @@ public class MessageAdapter extends ArrayAdapter<Message> {
 		}
 		boolean multiReceived = message.getConversation().getMode() == Conversation.MODE_MULTI
 			&& message.getMergedStatus() <= Message.STATUS_RECEIVED;
-		if (message.getType() == Message.TYPE_IMAGE || message.getType() == Message.TYPE_FILE || message.getDownloadable() != null) {
-			ImageParams params = message.getImageParams();
+		if (message.getType() == Message.TYPE_IMAGE || message.getType() == Message.TYPE_FILE || message.getTransferable() != null) {
+			FileParams params = message.getFileParams();
 			if (params.size > (1.5 * 1024 * 1024)) {
 				filesize = params.size / (1024 * 1024)+ " MiB";
 			} else if (params.size > 0) {
 				filesize = params.size / 1024 + " KiB";
 			}
-			if (message.getDownloadable() != null && message.getDownloadable().getStatus() == Downloadable.STATUS_FAILED) {
+			if (message.getTransferable() != null && message.getTransferable().getStatus() == Transferable.STATUS_FAILED) {
 				error = true;
 			}
 		}
@@ -121,7 +119,7 @@ public class MessageAdapter extends ArrayAdapter<Message> {
 				info = getContext().getString(R.string.waiting);
 				break;
 			case Message.STATUS_UNSEND:
-				Downloadable d = message.getDownloadable();
+				Transferable d = message.getTransferable();
 				if (d!=null) {
 					info = getContext().getString(R.string.sending_file,d.getProgress());
 				} else {
@@ -166,7 +164,7 @@ public class MessageAdapter extends ArrayAdapter<Message> {
 				message.getMergedTimeSent());
 		if (message.getStatus() <= Message.STATUS_RECEIVED) {
 			if ((filesize != null) && (info != null)) {
-				viewHolder.time.setText(filesize + " \u00B7 " + info);
+				viewHolder.time.setText(formatedTime + " \u00B7 " + filesize +" \u00B7 " + info);
 			} else if ((filesize == null) && (info != null)) {
 				viewHolder.time.setText(formatedTime + " \u00B7 " + info);
 			} else if ((filesize != null) && (info == null)) {
@@ -210,22 +208,42 @@ public class MessageAdapter extends ArrayAdapter<Message> {
 		viewHolder.image.setVisibility(View.GONE);
 		viewHolder.messageBody.setVisibility(View.VISIBLE);
 		viewHolder.messageBody.setText(getContext().getString(
-					R.string.decryption_failed));
+				R.string.decryption_failed));
 		viewHolder.messageBody.setTextColor(activity.getWarningTextColor());
 		viewHolder.messageBody.setTypeface(null, Typeface.NORMAL);
 		viewHolder.messageBody.setTextIsSelectable(false);
 	}
 
+	private void displayHeartMessage(final ViewHolder viewHolder, final String body) {
+		if (viewHolder.download_button != null) {
+			viewHolder.download_button.setVisibility(View.GONE);
+		}
+		viewHolder.image.setVisibility(View.GONE);
+		viewHolder.messageBody.setVisibility(View.VISIBLE);
+		viewHolder.messageBody.setIncludeFontPadding(false);
+		Spannable span = new SpannableString(body);
+		span.setSpan(new RelativeSizeSpan(4.0f), 0, body.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
+		span.setSpan(new ForegroundColorSpan(activity.getWarningTextColor()), 0, body.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
+		viewHolder.messageBody.setText(span);
+	}
+
 	private void displayTextMessage(final ViewHolder viewHolder, final Message message) {
 		if (viewHolder.download_button != null) {
 			viewHolder.download_button.setVisibility(View.GONE);
 		}
 		viewHolder.image.setVisibility(View.GONE);
 		viewHolder.messageBody.setVisibility(View.VISIBLE);
+		viewHolder.messageBody.setIncludeFontPadding(true);
 		if (message.getBody() != null) {
 			final String nick = UIHelper.getMessageDisplayName(message);
-			final String formattedBody = message.getMergedBody().replaceAll("^" + Message.ME_COMMAND,
-					nick + " ");
+			final String body = message.getMergedBody().replaceAll("^" + Message.ME_COMMAND,nick + " ");
+			final SpannableString formattedBody = new SpannableString(body);
+			int i = body.indexOf(Message.MERGE_SEPARATOR);
+			while(i >= 0) {
+				final int end = i + Message.MERGE_SEPARATOR.length();
+				formattedBody.setSpan(new RelativeSizeSpan(0.3f),i,end,Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
+				i = body.indexOf(Message.MERGE_SEPARATOR,end);
+			}
 			if (message.getType() != Message.TYPE_PRIVATE) {
 
 				if (message.hasMeCommand()) {
@@ -237,7 +255,7 @@ public class MessageAdapter extends ArrayAdapter<Message> {
                     boolean parseEmoticons = Settings.PARSE_EMOTICONS;
                     viewHolder.messageBody.setText(parseEmoticons ? UIHelper
                             .transformAsciiEmoticons(getContext(), message.getMergedBody())
-                            : message.getMergedBody());
+                            : formattedBody);
 				}
 			} else {
 				String privateMarker;
@@ -296,7 +314,7 @@ public class MessageAdapter extends ArrayAdapter<Message> {
 		viewHolder.image.setVisibility(View.GONE);
 		viewHolder.messageBody.setVisibility(View.GONE);
 		viewHolder.download_button.setVisibility(View.VISIBLE);
-		viewHolder.download_button.setText(activity.getString(R.string.open_x_file, UIHelper.getFileDescriptionString(activity,message)));
+		viewHolder.download_button.setText(activity.getString(R.string.open_x_file, UIHelper.getFileDescriptionString(activity, message)));
 		viewHolder.download_button.setOnClickListener(new OnClickListener() {
 
 			@Override
@@ -329,7 +347,7 @@ public class MessageAdapter extends ArrayAdapter<Message> {
 		}
 		viewHolder.messageBody.setVisibility(View.GONE);
 		viewHolder.image.setVisibility(View.VISIBLE);
-		ImageParams params = message.getImageParams();
+		FileParams params = message.getFileParams();
 		double target = metrics.density * 288;
 		int scalledW;
 		int scalledH;
@@ -341,7 +359,7 @@ public class MessageAdapter extends ArrayAdapter<Message> {
 			scalledH = (int) (params.height / ((double) params.width / target));
 		}
 		viewHolder.image.setLayoutParams(new LinearLayout.LayoutParams(
-					scalledW, scalledH));
+				scalledW, scalledH));
 		activity.loadBitmap(message, viewHolder.image);
 		viewHolder.image.setOnClickListener(new OnClickListener() {
 
@@ -366,10 +384,6 @@ public class MessageAdapter extends ArrayAdapter<Message> {
 		if (view == null) {
 			viewHolder = new ViewHolder();
 			switch (type) {
-				case NULL:
-					view = activity.getLayoutInflater().inflate(
-							R.layout.message_null, parent, false);
-					break;
 				case SENT:
 					view = activity.getLayoutInflater().inflate(
 							R.layout.message_sent, parent, false);
@@ -436,25 +450,6 @@ public class MessageAdapter extends ArrayAdapter<Message> {
 				viewHolder.status_message.setText(message.getBody());
 			}
 			return view;
-		} else if (type == NULL) {
-			if (viewHolder.message_box != null) {
-				Log.e(Config.LOGTAG, "detected type=NULL but with wrong cached view");
-				view = activity.getLayoutInflater().inflate(R.layout.message_null, parent, false);
-				view.setTag(new ViewHolder());
-			}
-			if (position == getCount() - 1) {
-				view.getLayoutParams().height = 1;
-			} else {
-				view.getLayoutParams().height = 0;
-
-			}
-			view.setLayoutParams(view.getLayoutParams());
-			return view;
-		} else if (message.wasMergedIntoPrevious()) {
-			Log.e(Config.LOGTAG,"detected wasMergedIntoPrevious with wrong type");
-			return view;
-		} else if (viewHolder.messageBody == null || viewHolder.image == null) {
-			return view; //avoiding weird platform bugs
 		} else if (type == RECEIVED) {
 			Contact contact = message.getContact();
 			if (contact != null) {
@@ -495,19 +490,19 @@ public class MessageAdapter extends ArrayAdapter<Message> {
 				}
 			});
 
-		final Downloadable downloadable = message.getDownloadable();
-		if (downloadable != null && downloadable.getStatus() != Downloadable.STATUS_UPLOADING) {
-			if (downloadable.getStatus() == Downloadable.STATUS_OFFER) {
+		final Transferable transferable = message.getTransferable();
+		if (transferable != null && transferable.getStatus() != Transferable.STATUS_UPLOADING) {
+			if (transferable.getStatus() == Transferable.STATUS_OFFER) {
 				displayDownloadableMessage(viewHolder,message,activity.getString(R.string.download_x_file, UIHelper.getFileDescriptionString(activity, message)));
-			} else if (downloadable.getStatus() == Downloadable.STATUS_OFFER_CHECK_FILESIZE) {
-				displayDownloadableMessage(viewHolder, message, activity.getString(R.string.check_image_filesize));
+			} else if (transferable.getStatus() == Transferable.STATUS_OFFER_CHECK_FILESIZE) {
+				displayDownloadableMessage(viewHolder, message, activity.getString(R.string.check_x_filesize, UIHelper.getFileDescriptionString(activity, message)));
 			} else {
 				displayInfoMessage(viewHolder, UIHelper.getMessagePreview(activity, message).first);
 			}
 		} else if (message.getType() == Message.TYPE_IMAGE && message.getEncryption() != Message.ENCRYPTION_PGP && message.getEncryption() != Message.ENCRYPTION_DECRYPTION_FAILED) {
 			displayImageMessage(viewHolder, message);
 		} else if (message.getType() == Message.TYPE_FILE && message.getEncryption() != Message.ENCRYPTION_PGP && message.getEncryption() != Message.ENCRYPTION_DECRYPTION_FAILED) {
-			if (message.getImageParams().width > 0) {
+			if (message.getFileParams().width > 0) {
 				displayImageMessage(viewHolder,message);
 			} else {
 				displayOpenableMessage(viewHolder, message);
@@ -534,6 +529,10 @@ public class MessageAdapter extends ArrayAdapter<Message> {
 		} else {
 			if (GeoHelper.isGeoUri(message.getBody())) {
 				displayLocationMessage(viewHolder,message);
+			} else if (message.bodyIsHeart()) {
+				displayHeartMessage(viewHolder, message.getBody().trim());
+			} else if (message.treatAsDownloadable() == Message.Decision.MUST) {
+				displayDownloadableMessage(viewHolder, message, activity.getString(R.string.check_x_filesize, UIHelper.getFileDescriptionString(activity, message)));
 			} else {
 				displayTextMessage(viewHolder, message);
 			}
@@ -545,12 +544,14 @@ public class MessageAdapter extends ArrayAdapter<Message> {
 	}
 
 	public void startDownloadable(Message message) {
-		Downloadable downloadable = message.getDownloadable();
-		if (downloadable != null) {
-			if (!downloadable.start()) {
+		Transferable transferable = message.getTransferable();
+		if (transferable != null) {
+			if (!transferable.start()) {
 				Toast.makeText(activity, R.string.not_connected_try_again,
 						Toast.LENGTH_SHORT).show();
 			}
+		} else if (message.treatAsDownloadable() != Message.Decision.NEVER) {
+			activity.xmppConnectionService.getHttpConnectionManager().createNewDownloadConnection(message);
 		}
 	}
 
diff --git a/src/main/java/eu/siacs/conversations/utils/CryptoHelper.java b/src/main/java/eu/siacs/conversations/utils/CryptoHelper.java
index eb7e2c3c..2dec203d 100644
--- a/src/main/java/eu/siacs/conversations/utils/CryptoHelper.java
+++ b/src/main/java/eu/siacs/conversations/utils/CryptoHelper.java
@@ -91,6 +91,11 @@ public final class CryptoHelper {
 	}
 
 	public static String prettifyFingerprint(String fingerprint) {
+		if (fingerprint==null) {
+			return "";
+		} else if (fingerprint.length() < 40) {
+			return fingerprint;
+		}
 		StringBuilder builder = new StringBuilder(fingerprint);
 		builder.insert(8, " ");
 		builder.insert(17, " ");
diff --git a/src/main/java/eu/siacs/conversations/utils/DNSHelper.java b/src/main/java/eu/siacs/conversations/utils/DNSHelper.java
index bcb2ca44..5a47bb3c 100644
--- a/src/main/java/eu/siacs/conversations/utils/DNSHelper.java
+++ b/src/main/java/eu/siacs/conversations/utils/DNSHelper.java
@@ -20,11 +20,19 @@ import java.util.ArrayList;
 import java.util.Collections;
 import java.util.Random;
 import java.util.TreeMap;
+import java.util.regex.Pattern;
 
 import android.os.Bundle;
 import android.util.Log;
 
 public class DNSHelper {
+
+	public static final Pattern PATTERN_IPV4 = Pattern.compile("\\A(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)(\\.(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)){3}\\z");
+	public static final Pattern PATTERN_IPV6_HEX4DECCOMPRESSED = Pattern.compile("\\A((?:[0-9A-Fa-f]{1,4}(?::[0-9A-Fa-f]{1,4})*)?) ::((?:[0-9A-Fa-f]{1,4}:)*)(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)(\\.(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)){3}\\z");
+	public static final Pattern PATTERN_IPV6_6HEX4DEC = Pattern.compile("\\A((?:[0-9A-Fa-f]{1,4}:){6,6})(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)(\\.(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)){3}\\z");
+	public static final Pattern PATTERN_IPV6_HEXCOMPRESSED = Pattern.compile("\\A((?:[0-9A-Fa-f]{1,4}(?::[0-9A-Fa-f]{1,4})*)?)::((?:[0-9A-Fa-f]{1,4}(?::[0-9A-Fa-f]{1,4})*)?)\\z");
+	public static final Pattern PATTERN_IPV6 = Pattern.compile("\\A(?:[0-9a-fA-F]{1,4}:){7}[0-9a-fA-F]{1,4}\\z");
+
 	protected static Client client = new Client();
 
 	public static Bundle getSRVRecord(final Jid jid) throws IOException {
@@ -37,9 +45,6 @@ public class DNSHelper {
 				Bundle b = queryDNS(host, ip);
 				if (b.containsKey("values")) {
 					return b;
-				} else if (b.containsKey("error")
-						&& "nosrv".equals(b.getString("error", null))) {
-					return b;
 				}
 			}
 		}
@@ -50,113 +55,96 @@ public class DNSHelper {
 		Bundle bundle = new Bundle();
 		try {
 			String qname = "_xmpp-client._tcp." + host;
-			Log.d(Config.LOGTAG,
-					"using dns server: " + dnsServer.getHostAddress()
-							+ " to look up " + host);
-			DNSMessage message = client.query(qname, TYPE.SRV, CLASS.IN,
-					dnsServer.getHostAddress());
-
-			// How should we handle priorities and weight?
-			// Wikipedia has a nice article about priorities vs. weights:
-			// https://en.wikipedia.org/wiki/SRV_record#Provisioning_for_high_service_availability
-
-			// we bucket the SRV records based on priority, pick per priority
-			// a random order respecting the weight, and dump that priority by
-			// priority
+			Log.d(Config.LOGTAG, "using dns server: " + dnsServer.getHostAddress() + " to look up " + host);
+			DNSMessage message = client.query(qname, TYPE.SRV, CLASS.IN, dnsServer.getHostAddress());
 
 			TreeMap<Integer, ArrayList<SRV>> priorities = new TreeMap<>();
 			TreeMap<String, ArrayList<String>> ips4 = new TreeMap<>();
 			TreeMap<String, ArrayList<String>> ips6 = new TreeMap<>();
 
-			for (Record[] rrset : new Record[][] { message.getAnswers(),
-					message.getAdditionalResourceRecords() }) {
+			for (Record[] rrset : new Record[][] { message.getAnswers(), message.getAdditionalResourceRecords() }) {
 				for (Record rr : rrset) {
 					Data d = rr.getPayload();
-					if (d instanceof SRV
-							&& NameUtil.idnEquals(qname, rr.getName())) {
+					if (d instanceof SRV && NameUtil.idnEquals(qname, rr.getName())) {
 						SRV srv = (SRV) d;
 						if (!priorities.containsKey(srv.getPriority())) {
-							priorities.put(srv.getPriority(),
-									new ArrayList<SRV>(2));
+							priorities.put(srv.getPriority(),new ArrayList<SRV>());
 						}
 						priorities.get(srv.getPriority()).add(srv);
 					}
 					if (d instanceof A) {
-						A arecord = (A) d;
+						A a = (A) d;
 						if (!ips4.containsKey(rr.getName())) {
-							ips4.put(rr.getName(), new ArrayList<String>(3));
+							ips4.put(rr.getName(), new ArrayList<String>());
 						}
-						ips4.get(rr.getName()).add(arecord.toString());
+						ips4.get(rr.getName()).add(a.toString());
 					}
 					if (d instanceof AAAA) {
 						AAAA aaaa = (AAAA) d;
 						if (!ips6.containsKey(rr.getName())) {
-							ips6.put(rr.getName(), new ArrayList<String>(3));
+							ips6.put(rr.getName(), new ArrayList<String>());
 						}
 						ips6.get(rr.getName()).add("[" + aaaa.toString() + "]");
 					}
 				}
 			}
 
-			Random rnd = new Random();
-			ArrayList<SRV> result = new ArrayList<>(
-					priorities.size() * 2 + 1);
+			ArrayList<SRV> result = new ArrayList<>();
 			for (ArrayList<SRV> s : priorities.values()) {
-
-				// trivial case
-				if (s.size() <= 1) {
-					result.addAll(s);
-					continue;
-				}
-
-				long totalweight = 0l;
-				for (SRV srv : s) {
-					totalweight += srv.getWeight();
-				}
-
-				while (totalweight > 0l && s.size() > 0) {
-					long p = (rnd.nextLong() & 0x7fffffffffffffffl)
-							% totalweight;
-					int i = 0;
-					while (p > 0) {
-						p -= s.get(i++).getPriority();
-					}
-					i--;
-					// remove is expensive, but we have only a few entries
-					// anyway
-					SRV srv = s.remove(i);
-					totalweight -= srv.getWeight();
-					result.add(srv);
-				}
-
-				Collections.shuffle(s, rnd);
 				result.addAll(s);
-
 			}
 
+			ArrayList<Bundle> values = new ArrayList<>();
 			if (result.size() == 0) {
-				bundle.putString("error", "nosrv");
+				DNSMessage response;
+				response = client.query(host, TYPE.A, CLASS.IN, dnsServer.getHostAddress());
+				for(int i = 0; i < response.getAnswers().length; ++i) {
+					values.add(createNamePortBundle(host,5222,response.getAnswers()[i].getPayload()));
+				}
+				response = client.query(host, TYPE.AAAA, CLASS.IN, dnsServer.getHostAddress());
+				for(int i = 0; i < response.getAnswers().length; ++i) {
+					values.add(createNamePortBundle(host,5222,response.getAnswers()[i].getPayload()));
+				}
+				values.add(createNamePortBundle(host,5222));
+				bundle.putParcelableArrayList("values", values);
 				return bundle;
 			}
-			ArrayList<Bundle> values = new ArrayList<>();
 			for (SRV srv : result) {
 				if (ips6.containsKey(srv.getName())) {
 					values.add(createNamePortBundle(srv.getName(),srv.getPort(),ips6));
+				} else {
+					DNSMessage response = client.query(srv.getName(), TYPE.AAAA, CLASS.IN, dnsServer.getHostAddress());
+					for(int i = 0; i < response.getAnswers().length; ++i) {
+						values.add(createNamePortBundle(srv.getName(),srv.getPort(),response.getAnswers()[i].getPayload()));
+					}
 				}
 				if (ips4.containsKey(srv.getName())) {
 					values.add(createNamePortBundle(srv.getName(),srv.getPort(),ips4));
+				} else {
+					DNSMessage response = client.query(srv.getName(), TYPE.A, CLASS.IN, dnsServer.getHostAddress());
+					for(int i = 0; i < response.getAnswers().length; ++i) {
+						values.add(createNamePortBundle(srv.getName(),srv.getPort(),response.getAnswers()[i].getPayload()));
+					}
 				}
-				values.add(createNamePortBundle(srv.getName(),srv.getPort(),null));
+				values.add(createNamePortBundle(srv.getName(), srv.getPort()));
 			}
 			bundle.putParcelableArrayList("values", values);
 		} catch (SocketTimeoutException e) {
 			bundle.putString("error", "timeout");
 		} catch (Exception e) {
+			e.printStackTrace();
 			bundle.putString("error", "unhandled");
 		}
 		return bundle;
 	}
 
+	private static Bundle createNamePortBundle(String name, int port) {
+		Bundle namePort = new Bundle();
+		namePort.putString("name", name);
+		namePort.putInt("port", port);
+		return namePort;
+	}
+
 	private static Bundle createNamePortBundle(String name, int port, TreeMap<String, ArrayList<String>> ips) {
 		Bundle namePort = new Bundle();
 		namePort.putString("name", name);
@@ -169,15 +157,23 @@ public class DNSHelper {
 		return namePort;
 	}
 
-	final protected static char[] hexArray = "0123456789ABCDEF".toCharArray();
-
-	public static String bytesToHex(byte[] bytes) {
-		char[] hexChars = new char[bytes.length * 2];
-		for (int j = 0; j < bytes.length; j++) {
-			int v = bytes[j] & 0xFF;
-			hexChars[j * 2] = hexArray[v >>> 4];
-			hexChars[j * 2 + 1] = hexArray[v & 0x0F];
+	private static Bundle createNamePortBundle(String name, int port, Data data) {
+		Bundle namePort = new Bundle();
+		namePort.putString("name", name);
+		namePort.putInt("port", port);
+		if (data instanceof A) {
+			namePort.putString("ip", data.toString());
+		} else if (data instanceof AAAA) {
+			namePort.putString("ip","["+data.toString()+"]");
 		}
-		return new String(hexChars);
+		return namePort;
+	}
+
+	public static boolean isIp(final String server) {
+		return PATTERN_IPV4.matcher(server).matches()
+				|| PATTERN_IPV6.matcher(server).matches()
+				|| PATTERN_IPV6_6HEX4DEC.matcher(server).matches()
+				|| PATTERN_IPV6_HEX4DECCOMPRESSED.matcher(server).matches()
+				|| PATTERN_IPV6_HEXCOMPRESSED.matcher(server).matches();
 	}
 }
diff --git a/src/main/java/eu/siacs/conversations/utils/GeoHelper.java b/src/main/java/eu/siacs/conversations/utils/GeoHelper.java
index f7dda936..74f91a98 100644
--- a/src/main/java/eu/siacs/conversations/utils/GeoHelper.java
+++ b/src/main/java/eu/siacs/conversations/utils/GeoHelper.java
@@ -20,7 +20,7 @@ public class GeoHelper {
 	}
 
 	public static ArrayList<Intent> createGeoIntentsFromMessage(Message message) {
-		final ArrayList<Intent> intents = new ArrayList();
+		final ArrayList<Intent> intents = new ArrayList<>();
 		Matcher matcher = GEO_URI.matcher(message.getBody());
 		if (!matcher.matches()) {
 			return intents;
@@ -54,8 +54,14 @@ public class GeoHelper {
 		Intent locationPluginIntent = new Intent("eu.siacs.conversations.location.show");
 		locationPluginIntent.putExtra("latitude",latitude);
 		locationPluginIntent.putExtra("longitude",longitude);
-		if (conversation.getMode() == Conversation.MODE_SINGLE && message.getStatus() == Message.STATUS_RECEIVED) {
-			locationPluginIntent.putExtra("name",conversation.getName());
+		if (conversation.getMode() == Conversation.MODE_SINGLE) {
+			if (message.getStatus() == Message.STATUS_RECEIVED) {
+				locationPluginIntent.putExtra("name",conversation.getName());
+				locationPluginIntent.putExtra("jid",message.getCounterpart().toString());
+			}
+			else {
+				locationPluginIntent.putExtra("jid",conversation.getAccount().getJid().toString());
+			}
 		}
 		intents.add(locationPluginIntent);
 
diff --git a/src/main/java/eu/siacs/conversations/utils/MimeUtils.java b/src/main/java/eu/siacs/conversations/utils/MimeUtils.java
new file mode 100644
index 00000000..a9e89d1b
--- /dev/null
+++ b/src/main/java/eu/siacs/conversations/utils/MimeUtils.java
@@ -0,0 +1,487 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package eu.siacs.conversations.utils;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Properties;
+/**
+ * Utilities for dealing with MIME types.
+ * Used to implement java.net.URLConnection and android.webkit.MimeTypeMap.
+ */
+public final class MimeUtils {
+    private static final Map<String, String> mimeTypeToExtensionMap = new HashMap<String, String>();
+    private static final Map<String, String> extensionToMimeTypeMap = new HashMap<String, String>();
+    static {
+        // The following table is based on /etc/mime.types data minus
+        // chemical/* MIME types and MIME types that don't map to any
+        // file extensions. We also exclude top-level domain names to
+        // deal with cases like:
+        //
+        // mail.google.com/a/google.com
+        //
+        // and "active" MIME types (due to potential security issues).
+        // Note that this list is _not_ in alphabetical order and must not be sorted.
+        // The "most popular" extension must come first, so that it's the one returned
+        // by guessExtensionFromMimeType.
+        add("application/andrew-inset", "ez");
+        add("application/dsptype", "tsp");
+        add("application/hta", "hta");
+        add("application/mac-binhex40", "hqx");
+        add("application/mathematica", "nb");
+        add("application/msaccess", "mdb");
+        add("application/oda", "oda");
+        add("application/ogg", "ogg");
+        add("application/ogg", "oga");
+        add("application/pdf", "pdf");
+        add("application/pgp-keys", "key");
+        add("application/pgp-signature", "pgp");
+        add("application/pics-rules", "prf");
+        add("application/pkix-cert", "cer");
+        add("application/rar", "rar");
+        add("application/rdf+xml", "rdf");
+        add("application/rss+xml", "rss");
+        add("application/zip", "zip");
+        add("application/vnd.android.package-archive", "apk");
+        add("application/vnd.cinderella", "cdy");
+        add("application/vnd.ms-pki.stl", "stl");
+        add("application/vnd.oasis.opendocument.database", "odb");
+        add("application/vnd.oasis.opendocument.formula", "odf");
+        add("application/vnd.oasis.opendocument.graphics", "odg");
+        add("application/vnd.oasis.opendocument.graphics-template", "otg");
+        add("application/vnd.oasis.opendocument.image", "odi");
+        add("application/vnd.oasis.opendocument.spreadsheet", "ods");
+        add("application/vnd.oasis.opendocument.spreadsheet-template", "ots");
+        add("application/vnd.oasis.opendocument.text", "odt");
+        add("application/vnd.oasis.opendocument.text-master", "odm");
+        add("application/vnd.oasis.opendocument.text-template", "ott");
+        add("application/vnd.oasis.opendocument.text-web", "oth");
+        add("application/vnd.google-earth.kml+xml", "kml");
+        add("application/vnd.google-earth.kmz", "kmz");
+        add("application/msword", "doc");
+        add("application/msword", "dot");
+        add("application/vnd.openxmlformats-officedocument.wordprocessingml.document", "docx");
+        add("application/vnd.openxmlformats-officedocument.wordprocessingml.template", "dotx");
+        add("application/vnd.ms-excel", "xls");
+        add("application/vnd.ms-excel", "xlt");
+        add("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", "xlsx");
+        add("application/vnd.openxmlformats-officedocument.spreadsheetml.template", "xltx");
+        add("application/vnd.ms-powerpoint", "ppt");
+        add("application/vnd.ms-powerpoint", "pot");
+        add("application/vnd.ms-powerpoint", "pps");
+        add("application/vnd.openxmlformats-officedocument.presentationml.presentation", "pptx");
+        add("application/vnd.openxmlformats-officedocument.presentationml.template", "potx");
+        add("application/vnd.openxmlformats-officedocument.presentationml.slideshow", "ppsx");
+        add("application/vnd.rim.cod", "cod");
+        add("application/vnd.smaf", "mmf");
+        add("application/vnd.stardivision.calc", "sdc");
+        add("application/vnd.stardivision.draw", "sda");
+        add("application/vnd.stardivision.impress", "sdd");
+        add("application/vnd.stardivision.impress", "sdp");
+        add("application/vnd.stardivision.math", "smf");
+        add("application/vnd.stardivision.writer", "sdw");
+        add("application/vnd.stardivision.writer", "vor");
+        add("application/vnd.stardivision.writer-global", "sgl");
+        add("application/vnd.sun.xml.calc", "sxc");
+        add("application/vnd.sun.xml.calc.template", "stc");
+        add("application/vnd.sun.xml.draw", "sxd");
+        add("application/vnd.sun.xml.draw.template", "std");
+        add("application/vnd.sun.xml.impress", "sxi");
+        add("application/vnd.sun.xml.impress.template", "sti");
+        add("application/vnd.sun.xml.math", "sxm");
+        add("application/vnd.sun.xml.writer", "sxw");
+        add("application/vnd.sun.xml.writer.global", "sxg");
+        add("application/vnd.sun.xml.writer.template", "stw");
+        add("application/vnd.visio", "vsd");
+        add("application/x-abiword", "abw");
+        add("application/x-apple-diskimage", "dmg");
+        add("application/x-bcpio", "bcpio");
+        add("application/x-bittorrent", "torrent");
+        add("application/x-cdf", "cdf");
+        add("application/x-cdlink", "vcd");
+        add("application/x-chess-pgn", "pgn");
+        add("application/x-cpio", "cpio");
+        add("application/x-debian-package", "deb");
+        add("application/x-debian-package", "udeb");
+        add("application/x-director", "dcr");
+        add("application/x-director", "dir");
+        add("application/x-director", "dxr");
+        add("application/x-dms", "dms");
+        add("application/x-doom", "wad");
+        add("application/x-dvi", "dvi");
+        add("application/x-font", "pfa");
+        add("application/x-font", "pfb");
+        add("application/x-font", "gsf");
+        add("application/x-font", "pcf");
+        add("application/x-font", "pcf.Z");
+        add("application/x-freemind", "mm");
+        // application/futuresplash isn't IANA, so application/x-futuresplash should come first.
+        add("application/x-futuresplash", "spl");
+        add("application/futuresplash", "spl");
+        add("application/x-gnumeric", "gnumeric");
+        add("application/x-go-sgf", "sgf");
+        add("application/x-graphing-calculator", "gcf");
+        add("application/x-gtar", "tgz");
+        add("application/x-gtar", "gtar");
+        add("application/x-gtar", "taz");
+        add("application/x-hdf", "hdf");
+        add("application/x-ica", "ica");
+        add("application/x-internet-signup", "ins");
+        add("application/x-internet-signup", "isp");
+        add("application/x-iphone", "iii");
+        add("application/x-iso9660-image", "iso");
+        add("application/x-jmol", "jmz");
+        add("application/x-kchart", "chrt");
+        add("application/x-killustrator", "kil");
+        add("application/x-koan", "skp");
+        add("application/x-koan", "skd");
+        add("application/x-koan", "skt");
+        add("application/x-koan", "skm");
+        add("application/x-kpresenter", "kpr");
+        add("application/x-kpresenter", "kpt");
+        add("application/x-kspread", "ksp");
+        add("application/x-kword", "kwd");
+        add("application/x-kword", "kwt");
+        add("application/x-latex", "latex");
+        add("application/x-lha", "lha");
+        add("application/x-lzh", "lzh");
+        add("application/x-lzx", "lzx");
+        add("application/x-maker", "frm");
+        add("application/x-maker", "maker");
+        add("application/x-maker", "frame");
+        add("application/x-maker", "fb");
+        add("application/x-maker", "book");
+        add("application/x-maker", "fbdoc");
+        add("application/x-mif", "mif");
+        add("application/x-ms-wmd", "wmd");
+        add("application/x-ms-wmz", "wmz");
+        add("application/x-msi", "msi");
+        add("application/x-ns-proxy-autoconfig", "pac");
+        add("application/x-nwc", "nwc");
+        add("application/x-object", "o");
+        add("application/x-oz-application", "oza");
+        add("application/x-pem-file", "pem");
+        add("application/x-pkcs12", "p12");
+        add("application/x-pkcs12", "pfx");
+        add("application/x-pkcs7-certreqresp", "p7r");
+        add("application/x-pkcs7-crl", "crl");
+        add("application/x-quicktimeplayer", "qtl");
+        add("application/x-shar", "shar");
+        add("application/x-shockwave-flash", "swf");
+        add("application/x-stuffit", "sit");
+        add("application/x-sv4cpio", "sv4cpio");
+        add("application/x-sv4crc", "sv4crc");
+        add("application/x-tar", "tar");
+        add("application/x-texinfo", "texinfo");
+        add("application/x-texinfo", "texi");
+        add("application/x-troff", "t");
+        add("application/x-troff", "roff");
+        add("application/x-troff-man", "man");
+        add("application/x-ustar", "ustar");
+        add("application/x-wais-source", "src");
+        add("application/x-wingz", "wz");
+        add("application/x-webarchive", "webarchive");
+        add("application/x-webarchive-xml", "webarchivexml");
+        add("application/x-x509-ca-cert", "crt");
+        add("application/x-x509-user-cert", "crt");
+        add("application/x-x509-server-cert", "crt");
+        add("application/x-xcf", "xcf");
+        add("application/x-xfig", "fig");
+        add("application/xhtml+xml", "xhtml");
+        add("audio/3gpp", "3gpp");
+        add("audio/aac", "aac");
+        add("audio/aac-adts", "aac");
+        add("audio/amr", "amr");
+        add("audio/amr-wb", "awb");
+        add("audio/basic", "snd");
+        add("audio/flac", "flac");
+        add("application/x-flac", "flac");
+        add("audio/imelody", "imy");
+        add("audio/midi", "mid");
+        add("audio/midi", "midi");
+        add("audio/midi", "ota");
+        add("audio/midi", "kar");
+        add("audio/midi", "rtttl");
+        add("audio/midi", "xmf");
+        add("audio/mobile-xmf", "mxmf");
+        // add ".mp3" first so it will be the default for guessExtensionFromMimeType
+        add("audio/mpeg", "mp3");
+        add("audio/mpeg", "mpga");
+        add("audio/mpeg", "mpega");
+        add("audio/mpeg", "mp2");
+        add("audio/mpeg", "m4a");
+        add("audio/mpegurl", "m3u");
+        add("audio/prs.sid", "sid");
+        add("audio/x-aiff", "aif");
+        add("audio/x-aiff", "aiff");
+        add("audio/x-aiff", "aifc");
+        add("audio/x-gsm", "gsm");
+        add("audio/x-matroska", "mka");
+        add("audio/x-mpegurl", "m3u");
+        add("audio/x-ms-wma", "wma");
+        add("audio/x-ms-wax", "wax");
+        add("audio/x-pn-realaudio", "ra");
+        add("audio/x-pn-realaudio", "rm");
+        add("audio/x-pn-realaudio", "ram");
+        add("audio/x-realaudio", "ra");
+        add("audio/x-scpls", "pls");
+        add("audio/x-sd2", "sd2");
+        add("audio/x-wav", "wav");
+        // image/bmp isn't IANA, so image/x-ms-bmp should come first.
+        add("image/x-ms-bmp", "bmp");
+        add("image/bmp", "bmp");
+        add("image/gif", "gif");
+        // image/ico isn't IANA, so image/x-icon should come first.
+        add("image/x-icon", "ico");
+        add("image/ico", "cur");
+        add("image/ico", "ico");
+        add("image/ief", "ief");
+        // add ".jpg" first so it will be the default for guessExtensionFromMimeType
+        add("image/jpeg", "jpg");
+        add("image/jpeg", "jpeg");
+        add("image/jpeg", "jpe");
+        add("image/pcx", "pcx");
+        add("image/png", "png");
+        add("image/svg+xml", "svg");
+        add("image/svg+xml", "svgz");
+        add("image/tiff", "tiff");
+        add("image/tiff", "tif");
+        add("image/vnd.djvu", "djvu");
+        add("image/vnd.djvu", "djv");
+        add("image/vnd.wap.wbmp", "wbmp");
+        add("image/webp", "webp");
+        add("image/x-cmu-raster", "ras");
+        add("image/x-coreldraw", "cdr");
+        add("image/x-coreldrawpattern", "pat");
+        add("image/x-coreldrawtemplate", "cdt");
+        add("image/x-corelphotopaint", "cpt");
+        add("image/x-jg", "art");
+        add("image/x-jng", "jng");
+        add("image/x-photoshop", "psd");
+        add("image/x-portable-anymap", "pnm");
+        add("image/x-portable-bitmap", "pbm");
+        add("image/x-portable-graymap", "pgm");
+        add("image/x-portable-pixmap", "ppm");
+        add("image/x-rgb", "rgb");
+        add("image/x-xbitmap", "xbm");
+        add("image/x-xpixmap", "xpm");
+        add("image/x-xwindowdump", "xwd");
+        add("model/iges", "igs");
+        add("model/iges", "iges");
+        add("model/mesh", "msh");
+        add("model/mesh", "mesh");
+        add("model/mesh", "silo");
+        add("text/calendar", "ics");
+        add("text/calendar", "icz");
+        add("text/comma-separated-values", "csv");
+        add("text/css", "css");
+        add("text/html", "htm");
+        add("text/html", "html");
+        add("text/h323", "323");
+        add("text/iuls", "uls");
+        add("text/mathml", "mml");
+        // add ".txt" first so it will be the default for guessExtensionFromMimeType
+        add("text/plain", "txt");
+        add("text/plain", "asc");
+        add("text/plain", "text");
+        add("text/plain", "diff");
+        add("text/plain", "po");     // reserve "pot" for vnd.ms-powerpoint
+        add("text/richtext", "rtx");
+        add("text/rtf", "rtf");
+        add("text/text", "phps");
+        add("text/tab-separated-values", "tsv");
+        add("text/xml", "xml");
+        add("text/x-bibtex", "bib");
+        add("text/x-boo", "boo");
+        add("text/x-c++hdr", "hpp");
+        add("text/x-c++hdr", "h++");
+        add("text/x-c++hdr", "hxx");
+        add("text/x-c++hdr", "hh");
+        add("text/x-c++src", "cpp");
+        add("text/x-c++src", "c++");
+        add("text/x-c++src", "cc");
+        add("text/x-c++src", "cxx");
+        add("text/x-chdr", "h");
+        add("text/x-component", "htc");
+        add("text/x-csh", "csh");
+        add("text/x-csrc", "c");
+        add("text/x-dsrc", "d");
+        add("text/x-haskell", "hs");
+        add("text/x-java", "java");
+        add("text/x-literate-haskell", "lhs");
+        add("text/x-moc", "moc");
+        add("text/x-pascal", "p");
+        add("text/x-pascal", "pas");
+        add("text/x-pcs-gcd", "gcd");
+        add("text/x-setext", "etx");
+        add("text/x-tcl", "tcl");
+        add("text/x-tex", "tex");
+        add("text/x-tex", "ltx");
+        add("text/x-tex", "sty");
+        add("text/x-tex", "cls");
+        add("text/x-vcalendar", "vcs");
+        add("text/x-vcard", "vcf");
+        add("video/3gpp", "3gpp");
+        add("video/3gpp", "3gp");
+        add("video/3gpp2", "3gpp2");
+        add("video/3gpp2", "3g2");
+        add("video/avi", "avi");
+        add("video/dl", "dl");
+        add("video/dv", "dif");
+        add("video/dv", "dv");
+        add("video/fli", "fli");
+        add("video/m4v", "m4v");
+        add("video/mp2ts", "ts");
+        add("video/mpeg", "mpeg");
+        add("video/mpeg", "mpg");
+        add("video/mpeg", "mpe");
+        add("video/mp4", "mp4");
+        add("video/mpeg", "VOB");
+        add("video/quicktime", "qt");
+        add("video/quicktime", "mov");
+        add("video/vnd.mpegurl", "mxu");
+        add("video/webm", "webm");
+        add("video/x-la-asf", "lsf");
+        add("video/x-la-asf", "lsx");
+        add("video/x-matroska", "mkv");
+        add("video/x-mng", "mng");
+        add("video/x-ms-asf", "asf");
+        add("video/x-ms-asf", "asx");
+        add("video/x-ms-wm", "wm");
+        add("video/x-ms-wmv", "wmv");
+        add("video/x-ms-wmx", "wmx");
+        add("video/x-ms-wvx", "wvx");
+        add("video/x-sgi-movie", "movie");
+        add("video/x-webex", "wrf");
+        add("x-conference/x-cooltalk", "ice");
+        add("x-epoc/x-sisx-app", "sisx");
+        applyOverrides();
+    }
+    private static void add(String mimeType, String extension) {
+        // If we have an existing x -> y mapping, we do not want to
+        // override it with another mapping x -> y2.
+        // If a mime type maps to several extensions
+        // the first extension added is considered the most popular
+        // so we do not want to overwrite it later.
+        if (!mimeTypeToExtensionMap.containsKey(mimeType)) {
+            mimeTypeToExtensionMap.put(mimeType, extension);
+        }
+        if (!extensionToMimeTypeMap.containsKey(extension)) {
+            extensionToMimeTypeMap.put(extension, mimeType);
+        }
+    }
+    private static InputStream getContentTypesPropertiesStream() {
+        // User override?
+        String userTable = System.getProperty("content.types.user.table");
+        if (userTable != null) {
+            File f = new File(userTable);
+            if (f.exists()) {
+                try {
+                    return new FileInputStream(f);
+                } catch (IOException ignored) {
+                }
+            }
+        }
+        // Standard location?
+        File f = new File(System.getProperty("java.home"), "lib" + File.separator + "content-types.properties");
+        if (f.exists()) {
+            try {
+                return new FileInputStream(f);
+            } catch (IOException ignored) {
+            }
+        }
+        return null;
+    }
+    /**
+     * This isn't what the RI does. The RI doesn't have hard-coded defaults, so supplying your
+     * own "content.types.user.table" means you don't get any of the built-ins, and the built-ins
+     * come from "$JAVA_HOME/lib/content-types.properties".
+     */
+    private static void applyOverrides() {
+        // Get the appropriate InputStream to read overrides from, if any.
+        InputStream stream = getContentTypesPropertiesStream();
+        if (stream == null) {
+            return;
+        }
+        try {
+            try {
+                // Read the properties file...
+                Properties overrides = new Properties();
+                overrides.load(stream);
+                // And translate its mapping to ours...
+                for (Map.Entry<Object, Object> entry : overrides.entrySet()) {
+                    String extension = (String) entry.getKey();
+                    String mimeType = (String) entry.getValue();
+                    add(mimeType, extension);
+                }
+            } finally {
+                stream.close();
+            }
+        } catch (IOException ignored) {
+        }
+    }
+    private MimeUtils() {
+    }
+    /**
+     * Returns true if the given MIME type has an entry in the map.
+     * @param mimeType A MIME type (i.e. text/plain)
+     * @return True iff there is a mimeType entry in the map.
+     */
+    public static boolean hasMimeType(String mimeType) {
+        if (mimeType == null || mimeType.isEmpty()) {
+            return false;
+        }
+        return mimeTypeToExtensionMap.containsKey(mimeType);
+    }
+    /**
+     * Returns the MIME type for the given extension.
+     * @param extension A file extension without the leading '.'
+     * @return The MIME type for the given extension or null iff there is none.
+     */
+    public static String guessMimeTypeFromExtension(String extension) {
+        if (extension == null || extension.isEmpty()) {
+            return null;
+        }
+        return extensionToMimeTypeMap.get(extension);
+    }
+    /**
+     * Returns true if the given extension has a registered MIME type.
+     * @param extension A file extension without the leading '.'
+     * @return True iff there is an extension entry in the map.
+     */
+    public static boolean hasExtension(String extension) {
+        if (extension == null || extension.isEmpty()) {
+            return false;
+        }
+        return extensionToMimeTypeMap.containsKey(extension);
+    }
+    /**
+     * Returns the registered extension for the given MIME type. Note that some
+     * MIME types map to multiple extensions. This call will return the most
+     * common extension for the given MIME type.
+     * @param mimeType A MIME type (i.e. text/plain)
+     * @return The extension for the given MIME type or null iff there is none.
+     */
+    public static String guessExtensionFromMimeType(String mimeType) {
+        if (mimeType == null || mimeType.isEmpty()) {
+            return null;
+        }
+        return mimeTypeToExtensionMap.get(mimeType);
+    }
+}
diff --git a/src/main/java/eu/siacs/conversations/utils/SerialSingleThreadExecutor.java b/src/main/java/eu/siacs/conversations/utils/SerialSingleThreadExecutor.java
new file mode 100644
index 00000000..bfb4668d
--- /dev/null
+++ b/src/main/java/eu/siacs/conversations/utils/SerialSingleThreadExecutor.java
@@ -0,0 +1,34 @@
+package eu.siacs.conversations.utils;
+
+import java.util.ArrayDeque;
+import java.util.Queue;
+import java.util.concurrent.Executor;
+import java.util.concurrent.Executors;
+
+public class SerialSingleThreadExecutor implements Executor {
+
+	final Executor executor = Executors.newSingleThreadExecutor();
+	final Queue<Runnable> tasks = new ArrayDeque();
+	Runnable active;
+
+	public synchronized void execute(final Runnable r) {
+		tasks.offer(new Runnable() {
+			public void run() {
+				try {
+					r.run();
+				} finally {
+					scheduleNext();
+				}
+			}
+		});
+		if (active == null) {
+			scheduleNext();
+		}
+	}
+
+	protected synchronized void scheduleNext() {
+		if ((active =  tasks.poll()) != null) {
+			executor.execute(active);
+		}
+	}
+}
\ No newline at end of file
diff --git a/src/main/java/eu/siacs/conversations/utils/UIHelper.java b/src/main/java/eu/siacs/conversations/utils/UIHelper.java
index 82e950ad..de669ea6 100644
--- a/src/main/java/eu/siacs/conversations/utils/UIHelper.java
+++ b/src/main/java/eu/siacs/conversations/utils/UIHelper.java
@@ -1,6 +1,7 @@
 package eu.siacs.conversations.utils;
 
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.net.URLConnection;
 import java.util.Calendar;
 import java.util.Date;
@@ -16,7 +17,8 @@ import eu.siacs.conversations.Config;
 import eu.siacs.conversations.R;
 import eu.siacs.conversations.entities.Contact;
 import eu.siacs.conversations.entities.Conversation;
-import eu.siacs.conversations.entities.Downloadable;
+import eu.siacs.conversations.entities.Presences;
+import eu.siacs.conversations.entities.Transferable;
 import eu.siacs.conversations.entities.Message;
 import eu.siacs.conversations.xmpp.jid.Jid;
 
@@ -29,6 +31,33 @@ import android.text.Spannable;
 import android.util.Pair;
 
 public class UIHelper {
+
+	private static String BLACK_HEART_SUIT = "\u2665";
+	private static String HEAVY_BLACK_HEART_SUIT = "\u2764";
+	private static String WHITE_HEART_SUIT = "\u2661";
+
+	public static final ArrayList<String> HEARTS = new ArrayList<>(Arrays.asList(BLACK_HEART_SUIT,HEAVY_BLACK_HEART_SUIT,WHITE_HEART_SUIT));
+
+	private static final ArrayList<String> LOCATION_QUESTIONS = new ArrayList<>(Arrays.asList(
+			"where are you", //en
+			"where are you now", //en
+			"where are you right now", //en
+			"whats your 20", //en
+			"what is your 20", //en
+			"what's your 20", //en
+			"whats your twenty", //en
+			"what is your twenty", //en
+			"what's your twenty", //en
+			"wo bist du", //de
+			"wo bist du jetzt", //de
+			"wo bist du gerade", //de
+			"wo seid ihr", //de
+			"wo seid ihr jetzt", //de
+			"wo seid ihr gerade", //de
+			"dónde estás", //es
+			"donde estas" //es
+		));
+
 	private static final int SHORT_DATE_FLAGS = DateUtils.FORMAT_SHOW_DATE
 		| DateUtils.FORMAT_NO_YEAR | DateUtils.FORMAT_ABBREV_ALL;
 	private static final int FULL_DATE_FLAGS = DateUtils.FORMAT_SHOW_TIME
@@ -253,24 +282,25 @@ public class UIHelper {
 	}
 
 	public static Pair<String,Boolean> getMessagePreview(final Context context, final Message message) {
-		final Downloadable d = message.getDownloadable();
+		final Transferable d = message.getTransferable();
 		if (d != null ) {
 			switch (d.getStatus()) {
-				case Downloadable.STATUS_CHECKING:
-					return new Pair<>(context.getString(R.string.checking_image),true);
-				case Downloadable.STATUS_DOWNLOADING:
+				case Transferable.STATUS_CHECKING:
+					return new Pair<>(context.getString(R.string.checking_x,
+									getFileDescriptionString(context,message)),true);
+				case Transferable.STATUS_DOWNLOADING:
 					return new Pair<>(context.getString(R.string.receiving_x_file,
 									getFileDescriptionString(context,message),
 									d.getProgress()),true);
-				case Downloadable.STATUS_OFFER:
-				case Downloadable.STATUS_OFFER_CHECK_FILESIZE:
+				case Transferable.STATUS_OFFER:
+				case Transferable.STATUS_OFFER_CHECK_FILESIZE:
 					return new Pair<>(context.getString(R.string.x_file_offered_for_download,
 									getFileDescriptionString(context,message)),true);
-				case Downloadable.STATUS_DELETED:
+				case Transferable.STATUS_DELETED:
 					return new Pair<>(context.getString(R.string.file_deleted),true);
-				case Downloadable.STATUS_FAILED:
+				case Transferable.STATUS_FAILED:
 					return new Pair<>(context.getString(R.string.file_transmission_failed),true);
-				case Downloadable.STATUS_UPLOADING:
+				case Transferable.STATUS_UPLOADING:
 					if (message.getStatus() == Message.STATUS_OFFERED) {
 						return new Pair<>(context.getString(R.string.offering_x_file,
 								getFileDescriptionString(context, message)), true);
@@ -310,16 +340,7 @@ public class UIHelper {
 		if (message.getType() == Message.TYPE_IMAGE) {
 			return context.getString(R.string.image);
 		}
-		final String path = message.getRelativeFilePath();
-		if (path == null) {
-			return "";
-		}
-		final String mime;
-		try {
-			mime = URLConnection.guessContentTypeFromName(path.replace("#",""));
-		} catch (final StringIndexOutOfBoundsException ignored) {
-			return context.getString(R.string.file);
-		}
+		final String mime = message.getMimeType();
 		if (mime == null) {
 			return context.getString(R.string.file);
 		} else if (mime.startsWith("audio/")) {
@@ -341,10 +362,14 @@ public class UIHelper {
 
 	public static String getMessageDisplayName(final Message message) {
 		if (message.getStatus() == Message.STATUS_RECEIVED) {
+			final Contact contact = message.getContact();
 			if (message.getConversation().getMode() == Conversation.MODE_MULTI) {
-				return getDisplayedMucCounterpart(message.getCounterpart());
+				if (contact != null) {
+					return contact.getDisplayName();
+				} else {
+					return getDisplayedMucCounterpart(message.getCounterpart());
+				}
 			} else {
-				final Contact contact = message.getContact();
 				return contact != null ? contact.getDisplayName() : "";
 			}
 		} else {
@@ -380,4 +405,15 @@ public class UIHelper {
 			return counterpart.toString().trim();
 		}
 	}
+
+	public static boolean receivedLocationQuestion(Message message) {
+		if (message == null
+				|| message.getStatus() != Message.STATUS_RECEIVED
+				|| message.getType() != Message.TYPE_TEXT) {
+			return false;
+		}
+		String body = message.getBody() == null ? null : message.getBody().trim().toLowerCase(Locale.getDefault());
+		body = body.replace("?","").replace("¿","");
+		return LOCATION_QUESTIONS.contains(body);
+	}
 }
diff --git a/src/main/java/eu/siacs/conversations/utils/Xmlns.java b/src/main/java/eu/siacs/conversations/utils/Xmlns.java
index 17fd2d26..868566d9 100644
--- a/src/main/java/eu/siacs/conversations/utils/Xmlns.java
+++ b/src/main/java/eu/siacs/conversations/utils/Xmlns.java
@@ -5,4 +5,5 @@ public final class Xmlns {
 	public static final String ROSTER = "jabber:iq:roster";
 	public static final String REGISTER = "jabber:iq:register";
 	public static final String BYTE_STREAMS = "http://jabber.org/protocol/bytestreams";
+	public static final String HTTP_UPLOAD = "eu:siacs:conversations:http:upload";
 }
diff --git a/src/main/java/eu/siacs/conversations/xml/Element.java b/src/main/java/eu/siacs/conversations/xml/Element.java
index 51708759..32657c66 100644
--- a/src/main/java/eu/siacs/conversations/xml/Element.java
+++ b/src/main/java/eu/siacs/conversations/xml/Element.java
@@ -57,6 +57,11 @@ public class Element {
 		return null;
 	}
 
+	public String findChildContent(String name) {
+		Element element = findChild(name);
+		return element == null ? null : element.getContent();
+	}
+
 	public Element findChild(String name, String xmlns) {
 		for (Element child : this.children) {
 			if (child.getName().equals(name)
@@ -67,6 +72,11 @@ public class Element {
 		return null;
 	}
 
+	public String findChildContent(String name, String xmlns) {
+		Element element = findChild(name,xmlns);
+		return element == null ? null : element.getContent();
+	}
+
 	public boolean hasChild(final String name) {
 		return findChild(name) != null;
 	}
diff --git a/src/main/java/eu/siacs/conversations/xmpp/XmppConnection.java b/src/main/java/eu/siacs/conversations/xmpp/XmppConnection.java
index 48dc2150..35c89b45 100644
--- a/src/main/java/eu/siacs/conversations/xmpp/XmppConnection.java
+++ b/src/main/java/eu/siacs/conversations/xmpp/XmppConnection.java
@@ -26,6 +26,7 @@ import java.net.IDN;
 import java.net.InetAddress;
 import java.net.InetSocketAddress;
 import java.net.Socket;
+import java.net.SocketAddress;
 import java.net.UnknownHostException;
 import java.security.KeyManagementException;
 import java.security.NoSuchAlgorithmException;
@@ -90,7 +91,7 @@ public class XmppConnection implements Runnable {
 	private boolean shouldBind = true;
 	private boolean shouldAuthenticate = true;
 	private Element streamFeatures;
-	private final HashMap<String, List<String>> disco = new HashMap<>();
+	private final HashMap<Jid, Info> disco = new HashMap<>();
 
 	private String streamId = null;
 	private int smVersion = 3;
@@ -155,56 +156,62 @@ public class XmppConnection implements Runnable {
 			tagWriter = new TagWriter();
 			packetCallbacks.clear();
 			this.changeStatus(Account.State.CONNECTING);
-			final Bundle result = DNSHelper.getSRVRecord(account.getServer());
-			final ArrayList<Parcelable> values = result.getParcelableArrayList("values");
-			if ("timeout".equals(result.getString("error"))) {
-				throw new IOException("timeout in dns");
-			} else if (values != null) {
-				int i = 0;
-				boolean socketError = true;
-				while (socketError && values.size() > i) {
-					final Bundle namePort = (Bundle) values.get(i);
-					try {
-						String srvRecordServer;
+			if (DNSHelper.isIp(account.getServer().toString())) {
+				socket = new Socket();
+				try {
+					socket.connect(new InetSocketAddress(account.getServer().toString(), 5222), Config.SOCKET_TIMEOUT * 1000);
+				} catch (IOException e) {
+					throw new UnknownHostException();
+				}
+			} else {
+				final Bundle result = DNSHelper.getSRVRecord(account.getServer());
+				final ArrayList<Parcelable> values = result.getParcelableArrayList("values");
+				if ("timeout".equals(result.getString("error"))) {
+					throw new IOException("timeout in dns");
+				} else if (values != null) {
+					int i = 0;
+					boolean socketError = true;
+					while (socketError && values.size() > i) {
+						final Bundle namePort = (Bundle) values.get(i);
 						try {
-							srvRecordServer=IDN.toASCII(namePort.getString("name"));
-						} catch (final IllegalArgumentException e) {
-							// TODO: Handle me?`
-							srvRecordServer = "";
-						}
-						final int srvRecordPort = namePort.getInt("port");
-						final String srvIpServer = namePort.getString("ip");
-						final InetSocketAddress addr;
-						if (srvIpServer != null) {
-							addr = new InetSocketAddress(srvIpServer, srvRecordPort);
-							Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
-									+ ": using values from dns " + srvRecordServer
-									+ "[" + srvIpServer + "]:" + srvRecordPort);
-						} else {
-							addr = new InetSocketAddress(srvRecordServer, srvRecordPort);
-							Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
-									+ ": using values from dns "
-									+ srvRecordServer + ":" + srvRecordPort);
+							String srvRecordServer;
+							try {
+								srvRecordServer = IDN.toASCII(namePort.getString("name"));
+							} catch (final IllegalArgumentException e) {
+								// TODO: Handle me?`
+								srvRecordServer = "";
+							}
+							final int srvRecordPort = namePort.getInt("port");
+							final String srvIpServer = namePort.getString("ip");
+							final InetSocketAddress addr;
+							if (srvIpServer != null) {
+								addr = new InetSocketAddress(srvIpServer, srvRecordPort);
+								Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
+										+ ": using values from dns " + srvRecordServer
+										+ "[" + srvIpServer + "]:" + srvRecordPort);
+							} else {
+								addr = new InetSocketAddress(srvRecordServer, srvRecordPort);
+								Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
+										+ ": using values from dns "
+										+ srvRecordServer + ":" + srvRecordPort);
+							}
+							socket = new Socket();
+							socket.connect(addr, Config.SOCKET_TIMEOUT * 1000);
+							socketError = false;
+						} catch (final UnknownHostException e) {
+							Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": " + e.getMessage());
+							i++;
+						} catch (final IOException e) {
+							Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": " + e.getMessage());
+							i++;
 						}
-						socket = new Socket();
-						socket.connect(addr, 20000);
-						socketError = false;
-					} catch (final UnknownHostException e) {
-						Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": " + e.getMessage());
-						i++;
-					} catch (final IOException e) {
-						Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": " + e.getMessage());
-						i++;
 					}
+					if (socketError) {
+						throw new UnknownHostException();
+					}
+				} else {
+					throw new IOException("unhandled exception in DNS resolver");
 				}
-				if (socketError) {
-					throw new UnknownHostException();
-				}
-			} else if (result.containsKey("error")
-					&& "nosrv".equals(result.getString("error", null))) {
-				socket = new Socket(account.getServer().getDomainpart(), 5222);
-			} else {
-				throw new IOException("timeout in dns");
 			}
 			final OutputStream out = socket.getOutputStream();
 			tagWriter.setOutputStream(out);
@@ -224,6 +231,12 @@ public class XmppConnection implements Runnable {
 			if (socket.isConnected()) {
 				socket.close();
 			}
+		} catch (final IncompatibleServerException e) {
+			this.changeStatus(Account.State.INCOMPATIBLE_SERVER);
+		} catch (final SecurityException e) {
+			this.changeStatus(Account.State.SECURITY_ERROR);
+		} catch (final UnauthorizedException e) {
+			this.changeStatus(Account.State.UNAUTHORIZED);
 		} catch (final UnknownHostException | ConnectException e) {
 			this.changeStatus(Account.State.SERVER_NOT_FOUND);
 		} catch (final IOException | XmlPullParserException | NoSuchAlgorithmException e) {
@@ -231,6 +244,13 @@ public class XmppConnection implements Runnable {
 			this.changeStatus(Account.State.OFFLINE);
 			this.attempt--; //don't count attempt when reconnecting instantly anyway
 		} finally {
+			if (socket != null) {
+				try {
+					socket.close();
+				} catch (IOException e) {
+
+				}
+			}
 			if (wakeLock.isHeld()) {
 				try {
 					wakeLock.release();
@@ -279,8 +299,7 @@ public class XmppConnection implements Runnable {
 								processStream(tagReader.readTag());
 								break;
 							} else if (nextTag.isStart("failure")) {
-								tagReader.readElement(nextTag);
-								changeStatus(Account.State.UNAUTHORIZED);
+								throw new UnauthorizedException();
 							} else if (nextTag.isStart("challenge")) {
 								final String challenge = tagReader.readElement(nextTag).getContent();
 								final Element response = new Element("response");
@@ -334,23 +353,34 @@ public class XmppConnection implements Runnable {
 								} catch (final NumberFormatException ignored) {
 								}
 								sendServiceDiscoveryInfo(account.getServer());
+								sendServiceDiscoveryInfo(account.getJid().toBareJid());
 								sendServiceDiscoveryItems(account.getServer());
 								sendInitialPing();
 							} else if (nextTag.isStart("r")) {
 								tagReader.readElement(nextTag);
+								if (Config.EXTENDED_SM_LOGGING) {
+									Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": acknowledging stanza #" + this.stanzasReceived);
+								}
 								final AckPacket ack = new AckPacket(this.stanzasReceived, smVersion);
 								tagWriter.writeStanzaAsync(ack);
 							} else if (nextTag.isStart("a")) {
 								final Element ack = tagReader.readElement(nextTag);
 								lastPacketReceived = SystemClock.elapsedRealtime();
-								final int serverSequence = Integer.parseInt(ack.getAttribute("h"));
-								final String msgId = this.messageReceipts.get(serverSequence);
-								if (msgId != null) {
-									if (this.acknowledgedListener != null) {
-										this.acknowledgedListener.onMessageAcknowledged(
-												account, msgId);
+								try {
+									final int serverSequence = Integer.parseInt(ack.getAttribute("h"));
+									if (Config.EXTENDED_SM_LOGGING) {
+										Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": server acknowledged stanza #" + serverSequence);
 									}
-									this.messageReceipts.remove(serverSequence);
+									final String msgId = this.messageReceipts.get(serverSequence);
+									if (msgId != null) {
+										if (this.acknowledgedListener != null) {
+											this.acknowledgedListener.onMessageAcknowledged(
+													account, msgId);
+										}
+										this.messageReceipts.remove(serverSequence);
+									}
+								} catch (NumberFormatException e) {
+									Log.d(Config.LOGTAG,account.getJid().toBareJid()+": server send ack without sequence number");
 								}
 							} else if (nextTag.isStart("failed")) {
 								tagReader.readElement(nextTag);
@@ -430,6 +460,10 @@ public class XmppConnection implements Runnable {
 				throw new IOException("interrupted mid tag");
 			}
 		}
+		if (stanzasReceived == Integer.MAX_VALUE) {
+			resetStreamId();
+			throw new IOException("time to restart the session. cant handle >2 billion pcks");
+		}
 		++stanzasReceived;
 		lastPacketReceived = SystemClock.elapsedRealtime();
 		return element;
@@ -531,8 +565,7 @@ public class XmppConnection implements Runnable {
 
 			if (!verifier.verify(account.getServer().getDomainpart(),sslSocket.getSession())) {
 				Log.d(Config.LOGTAG,account.getJid().toBareJid()+": TLS certificate verification failed");
-				disconnect(true);
-				changeStatus(Account.State.SECURITY_ERROR);
+				throw new SecurityException();
 			}
 			tagReader.setInputStream(sslSocket.getInputStream());
 			tagWriter.setOutputStream(sslSocket.getOutputStream());
@@ -543,8 +576,7 @@ public class XmppConnection implements Runnable {
 			sslSocket.close();
 		} catch (final NoSuchAlgorithmException | KeyManagementException e1) {
 			Log.d(Config.LOGTAG,account.getJid().toBareJid()+": TLS certificate verification failed");
-			disconnect(true);
-			changeStatus(Account.State.SECURITY_ERROR);
+			throw new SecurityException();
 		}
 	}
 
@@ -574,31 +606,36 @@ public class XmppConnection implements Runnable {
 			} else if (mechanisms.contains("DIGEST-MD5")) {
 				saslMechanism = new DigestMd5(tagWriter, account, mXmppConnectionService.getRNG());
 			}
-			final JSONObject keys = account.getKeys();
-			try {
-				if (keys.has(Account.PINNED_MECHANISM_KEY) &&
-						keys.getInt(Account.PINNED_MECHANISM_KEY) > saslMechanism.getPriority() ) {
-					Log.e(Config.LOGTAG, "Auth failed. Authentication mechanism " + saslMechanism.getMechanism() +
-							" has lower priority (" + String.valueOf(saslMechanism.getPriority()) +
-							") than pinned priority (" + keys.getInt(Account.PINNED_MECHANISM_KEY) +
-							"). Possible downgrade attack?");
-					disconnect(true);
-					changeStatus(Account.State.SECURITY_ERROR);
-						}
-			} catch (final JSONException e) {
-				Log.d(Config.LOGTAG, "Parse error while checking pinned auth mechanism");
-			}
-			Log.d(Config.LOGTAG,account.getJid().toString()+": Authenticating with " + saslMechanism.getMechanism());
-			auth.setAttribute("mechanism", saslMechanism.getMechanism());
-			if (!saslMechanism.getClientFirstMessage().isEmpty()) {
-				auth.setContent(saslMechanism.getClientFirstMessage());
+			if (saslMechanism != null) {
+				final JSONObject keys = account.getKeys();
+				try {
+					if (keys.has(Account.PINNED_MECHANISM_KEY) &&
+							keys.getInt(Account.PINNED_MECHANISM_KEY) > saslMechanism.getPriority()) {
+						Log.e(Config.LOGTAG, "Auth failed. Authentication mechanism " + saslMechanism.getMechanism() +
+								" has lower priority (" + String.valueOf(saslMechanism.getPriority()) +
+								") than pinned priority (" + keys.getInt(Account.PINNED_MECHANISM_KEY) +
+								"). Possible downgrade attack?");
+						throw new SecurityException();
+					}
+				} catch (final JSONException e) {
+					Log.d(Config.LOGTAG, "Parse error while checking pinned auth mechanism");
+				}
+				Log.d(Config.LOGTAG, account.getJid().toString() + ": Authenticating with " + saslMechanism.getMechanism());
+				auth.setAttribute("mechanism", saslMechanism.getMechanism());
+				if (!saslMechanism.getClientFirstMessage().isEmpty()) {
+					auth.setContent(saslMechanism.getClientFirstMessage());
+				}
+				tagWriter.writeElement(auth);
+			} else {
+				throw new IncompatibleServerException();
 			}
-			tagWriter.writeElement(auth);
 		} else if (this.streamFeatures.hasChild("sm", "urn:xmpp:sm:"
 					+ smVersion)
 				&& streamId != null) {
-			final ResumePacket resume = new ResumePacket(this.streamId,
-					stanzasReceived, smVersion);
+			if (Config.EXTENDED_SM_LOGGING) {
+				Log.d(Config.LOGTAG,account.getJid().toBareJid()+": resuming after stanza #"+stanzasReceived);
+			}
+			final ResumePacket resume = new ResumePacket(this.streamId, stanzasReceived, smVersion);
 			this.tagWriter.writeStanzaAsync(resume);
 		} else if (this.streamFeatures.hasChild("bind") && shouldBind) {
 			sendBindRequest();
@@ -629,10 +666,8 @@ public class XmppConnection implements Runnable {
 				if (packet.query().hasChild("username")
 						&& (packet.query().hasChild("password"))) {
 					final IqPacket register = new IqPacket(IqPacket.TYPE.SET);
-					final Element username = new Element("username")
-						.setContent(account.getUsername());
-					final Element password = new Element("password")
-						.setContent(account.getPassword());
+					final Element username = new Element("username").setContent(account.getUsername());
+					final Element password = new Element("password").setContent(account.getPassword());
 					register.query("jabber:iq:register").addChild(username);
 					register.query().addChild(password);
 					sendIqPacket(register, new OnIqPacketReceived() {
@@ -645,7 +680,7 @@ public class XmppConnection implements Runnable {
 								changeStatus(Account.State.REGISTRATION_SUCCESSFUL);
 							} else if (packet.hasChild("error")
 									&& (packet.findChild("error")
-										.hasChild("conflict"))) {
+									.hasChild("conflict"))) {
 								changeStatus(Account.State.REGISTRATION_CONFLICT);
 							} else {
 								changeStatus(Account.State.REGISTRATION_FAILED);
@@ -659,7 +694,7 @@ public class XmppConnection implements Runnable {
 					disconnect(true);
 					Log.d(Config.LOGTAG, account.getJid().toBareJid()
 							+ ": could not register. instructions are"
-							+ instructions.getContent());
+							+ (instructions != null ? instructions.getContent() : ""));
 				}
 			}
 		});
@@ -674,7 +709,7 @@ public class XmppConnection implements Runnable {
 		}
 		final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
 		iq.addChild("bind", "urn:ietf:params:xml:ns:xmpp-bind")
-			.addChild("resource").setContent(account.getResource());
+				.addChild("resource").setContent(account.getResource());
 		this.sendUnmodifiedIqPacket(iq, new OnIqPacketReceived() {
 			@Override
 			public void onIqPacketReceived(final Account account, final IqPacket packet) {
@@ -734,6 +769,7 @@ public class XmppConnection implements Runnable {
 		features.blockListRequested = false;
 		disco.clear();
 		sendServiceDiscoveryInfo(account.getServer());
+		sendServiceDiscoveryInfo(account.getJid().toBareJid());
 		sendServiceDiscoveryItems(account.getServer());
 		if (bindListener != null) {
 			bindListener.onBind(account);
@@ -741,34 +777,35 @@ public class XmppConnection implements Runnable {
 		sendInitialPing();
 	}
 
-	private void sendServiceDiscoveryInfo(final Jid server) {
-		if (disco.containsKey(server.toDomainJid().toString())) {
-			if (account.getServer().equals(server.toDomainJid())) {
+	private void sendServiceDiscoveryInfo(final Jid jid) {
+		if (disco.containsKey(jid)) {
+			if (account.getServer().equals(jid)) {
 				enableAdvancedStreamFeatures();
 			}
 		} else {
 			final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
-			iq.setTo(server.toDomainJid());
+			iq.setTo(jid);
 			iq.query("http://jabber.org/protocol/disco#info");
 			this.sendIqPacket(iq, new OnIqPacketReceived() {
 
 				@Override
 				public void onIqPacketReceived(final Account account, final IqPacket packet) {
 					final List<Element> elements = packet.query().getChildren();
-					final List<String> features = new ArrayList<>();
+					final Info info = new Info();
 					for (final Element element : elements) {
 						if (element.getName().equals("identity")) {
-							if ("irc".equals(element.getAttribute("type"))) {
-								//add fake feature to not confuse irc and real muc
-								features.add("siacs:no:muc");
+							String type = element.getAttribute("type");
+							String category = element.getAttribute("category");
+							if (type != null && category != null) {
+								info.identities.add(new Pair<>(category,type));
 							}
 						} else if (element.getName().equals("feature")) {
-							features.add(element.getAttribute("var"));
+							info.features.add(element.getAttribute("var"));
 						}
 					}
-					disco.put(server.toDomainJid().toString(), features);
+					disco.put(jid, info);
 
-					if (account.getServer().equals(server.toDomainJid())) {
+					if (account.getServer().equals(jid)) {
 						enableAdvancedStreamFeatures();
 						for (final OnAdvancedStreamFeaturesLoaded listener : advancedStreamFeaturesLoadedListeners) {
 							listener.onAdvancedStreamFeaturesAvailable(account);
@@ -784,7 +821,7 @@ public class XmppConnection implements Runnable {
 			sendEnableCarbons();
 		}
 		if (getFeatures().blocking() && !features.blockListRequested) {
-			Log.d(Config.LOGTAG, "Requesting block list");
+			Log.d(Config.LOGTAG,account.getJid().toBareJid()+": Requesting block list");
 			this.sendIqPacket(getIqGenerator().generateGetBlockList(), mXmppConnectionService.getIqParser());
 		}
 	}
@@ -885,13 +922,20 @@ public class XmppConnection implements Runnable {
 	}
 
 	private synchronized void sendPacket(final AbstractStanza packet) {
+		if (stanzasSent == Integer.MAX_VALUE) {
+			resetStreamId();
+			disconnect(true);
+			return;
+		}
 		final String name = packet.getName();
 		if (name.equals("iq") || name.equals("message") || name.equals("presence")) {
 			++stanzasSent;
 		}
 		tagWriter.writeStanzaAsync(packet);
-		if (packet instanceof MessagePacket && packet.getId() != null && this.streamId != null) {
-			Log.d(Config.LOGTAG, "request delivery report for stanza " + stanzasSent);
+		if (packet instanceof MessagePacket && packet.getId() != null && getFeatures().sm()) {
+			if (Config.EXTENDED_SM_LOGGING) {
+				Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": requesting ack for message stanza #" + stanzasSent);
+			}
 			this.messageReceipts.put(stanzasSent, packet.getId());
 			tagWriter.writeStanzaAsync(new RequestPacket(this.smVersion));
 		}
@@ -981,18 +1025,22 @@ public class XmppConnection implements Runnable {
 		}
 	}
 
-	public List<String> findDiscoItemsByFeature(final String feature) {
-		final List<String> items = new ArrayList<>();
-		for (final Entry<String, List<String>> cursor : disco.entrySet()) {
-			if (cursor.getValue().contains(feature)) {
+	public void resetStreamId() {
+		this.streamId = null;
+	}
+
+	public List<Jid> findDiscoItemsByFeature(final String feature) {
+		final List<Jid> items = new ArrayList<>();
+		for (final Entry<Jid, Info> cursor : disco.entrySet()) {
+			if (cursor.getValue().features.contains(feature)) {
 				items.add(cursor.getKey());
 			}
 		}
 		return items;
 	}
 
-	public String findDiscoItemByFeature(final String feature) {
-		final List<String> items = findDiscoItemsByFeature(feature);
+	public Jid findDiscoItemByFeature(final String feature) {
+		final List<Jid> items = findDiscoItemsByFeature(feature);
 		if (items.size() >= 1) {
 			return items.get(0);
 		}
@@ -1004,10 +1052,12 @@ public class XmppConnection implements Runnable {
 	}
 
 	public String getMucServer() {
-		for (final Entry<String, List<String>> cursor : disco.entrySet()) {
-			final List<String> value = cursor.getValue();
-			if (value.contains("http://jabber.org/protocol/muc") && !value.contains("jabber:iq:gateway") && !value.contains("siacs:no:muc")) {
-				return cursor.getKey();
+		for (final Entry<Jid, Info> cursor : disco.entrySet()) {
+			final Info value = cursor.getValue();
+			if (value.features.contains("http://jabber.org/protocol/muc")
+					&& !value.features.contains("jabber:iq:gateway")
+					&& !value.identities.contains(new Pair<>("conference","irc"))) {
+				return cursor.getKey().toString();
 			}
 		}
 		return null;
@@ -1062,6 +1112,23 @@ public class XmppConnection implements Runnable {
 		this.lastConnect = 0;
 	}
 
+	private class Info {
+		public final ArrayList<String> features = new ArrayList<>();
+		public final ArrayList<Pair<String,String>> identities = new ArrayList<>();
+	}
+
+	private class UnauthorizedException extends IOException {
+
+	}
+
+	private class SecurityException extends IOException {
+
+	}
+
+	private class IncompatibleServerException extends IOException {
+
+	}
+
 	public class Features {
 		XmppConnection connection;
 		private boolean carbonsEnabled = false;
@@ -1073,8 +1140,8 @@ public class XmppConnection implements Runnable {
 		}
 
 		private boolean hasDiscoFeature(final Jid server, final String feature) {
-			return connection.disco.containsKey(server.toDomainJid().toString()) &&
-				connection.disco.get(server.toDomainJid().toString()).contains(feature);
+			return connection.disco.containsKey(server) &&
+				connection.disco.get(server).features.contains(feature);
 		}
 
 		public boolean carbons() {
@@ -1090,24 +1157,35 @@ public class XmppConnection implements Runnable {
 		}
 
 		public boolean sm() {
-			return streamId != null;
+			return streamId != null
+					|| (connection.streamFeatures != null && connection.streamFeatures.hasChild("sm"));
 		}
 
 		public boolean csi() {
 			return connection.streamFeatures != null && connection.streamFeatures.hasChild("csi", "urn:xmpp:csi:0");
 		}
 
-		public boolean pubsub() {
-			return hasDiscoFeature(account.getServer(),
-					"http://jabber.org/protocol/pubsub#publish");
+		public boolean pep() {
+			final Pair<String,String> needle = new Pair<>("pubsub","pep");
+			Info info = disco.get(account.getServer());
+			if (info != null && info.identities.contains(needle)) {
+				return true;
+			} else {
+				info = disco.get(account.getJid().toBareJid());
+				return info != null && info.identities.contains(needle);
+			}
 		}
 
 		public boolean mam() {
-			return hasDiscoFeature(account.getServer(), "urn:xmpp:mam:0");
+			if (hasDiscoFeature(account.getJid().toBareJid(), "urn:xmpp:mam:0")) {
+				return true;
+			} else {
+				return hasDiscoFeature(account.getServer(), "urn:xmpp:mam:0");
+			}
 		}
 
 		public boolean advancedStreamFeaturesLoaded() {
-			return disco.containsKey(account.getServer().toString());
+			return disco.containsKey(account.getServer());
 		}
 
 		public boolean rosterVersioning() {
@@ -1117,6 +1195,10 @@ public class XmppConnection implements Runnable {
 		public void setBlockListRequested(boolean value) {
 			this.blockListRequested = value;
 		}
+
+		public boolean httpUpload() {
+			return findDiscoItemsByFeature(Xmlns.HTTP_UPLOAD).size() > 0;
+		}
 	}
 
 	private IqGenerator getIqGenerator() {
diff --git a/src/main/java/eu/siacs/conversations/xmpp/jid/Jid.java b/src/main/java/eu/siacs/conversations/xmpp/jid/Jid.java
index 295e067a..f989c0c2 100644
--- a/src/main/java/eu/siacs/conversations/xmpp/jid/Jid.java
+++ b/src/main/java/eu/siacs/conversations/xmpp/jid/Jid.java
@@ -130,12 +130,19 @@ public final class Jid {
 			if (resourcepart.isEmpty() || resourcepart.length() > 1023) {
 				throw new InvalidJidException(InvalidJidException.INVALID_PART_LENGTH);
 			}
-			dp = IDN.toUnicode(jid.substring(domainpartStart, slashLoc), IDN.USE_STD3_ASCII_RULES);
+			try {
+				dp = IDN.toUnicode(Stringprep.nameprep(jid.substring(domainpartStart, slashLoc)), IDN.USE_STD3_ASCII_RULES);
+			} catch (final StringprepException e) {
+				throw new InvalidJidException(InvalidJidException.STRINGPREP_FAIL, e);
+			}
 			finaljid = finaljid + dp + "/" + rp;
 		} else {
 			resourcepart = "";
-			dp = IDN.toUnicode(jid.substring(domainpartStart, jid.length()),
-					IDN.USE_STD3_ASCII_RULES);
+			try{
+				dp = IDN.toUnicode(Stringprep.nameprep(jid.substring(domainpartStart, jid.length())), IDN.USE_STD3_ASCII_RULES);
+			} catch (final StringprepException e) {
+				throw new InvalidJidException(InvalidJidException.STRINGPREP_FAIL, e);
+			}
 			finaljid = finaljid + dp;
 		}
 
diff --git a/src/main/java/eu/siacs/conversations/xmpp/jingle/JingleConnection.java b/src/main/java/eu/siacs/conversations/xmpp/jingle/JingleConnection.java
index 0db0deee..2c56488d 100644
--- a/src/main/java/eu/siacs/conversations/xmpp/jingle/JingleConnection.java
+++ b/src/main/java/eu/siacs/conversations/xmpp/jingle/JingleConnection.java
@@ -1,6 +1,5 @@
 package eu.siacs.conversations.xmpp.jingle;
 
-import java.net.URLConnection;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Iterator;
@@ -16,9 +15,9 @@ import android.util.Log;
 import eu.siacs.conversations.Config;
 import eu.siacs.conversations.entities.Account;
 import eu.siacs.conversations.entities.Conversation;
-import eu.siacs.conversations.entities.Downloadable;
+import eu.siacs.conversations.entities.Transferable;
 import eu.siacs.conversations.entities.DownloadableFile;
-import eu.siacs.conversations.entities.DownloadablePlaceholder;
+import eu.siacs.conversations.entities.TransferablePlaceholder;
 import eu.siacs.conversations.entities.Message;
 import eu.siacs.conversations.services.XmppConnectionService;
 import eu.siacs.conversations.xml.Element;
@@ -29,7 +28,7 @@ import eu.siacs.conversations.xmpp.jingle.stanzas.JinglePacket;
 import eu.siacs.conversations.xmpp.jingle.stanzas.Reason;
 import eu.siacs.conversations.xmpp.stanzas.IqPacket;
 
-public class JingleConnection implements Downloadable {
+public class JingleConnection implements Transferable {
 
 	private JingleConnectionManager mJingleConnectionManager;
 	private XmppConnectionService mXmppConnectionService;
@@ -40,10 +39,10 @@ public class JingleConnection implements Downloadable {
 	protected static final int JINGLE_STATUS_TRANSMITTING = 5;
 	protected static final int JINGLE_STATUS_FAILED = 99;
 
-	private int ibbBlockSize = 4096;
+	private int ibbBlockSize = 8192;
 
 	private int mJingleStatus = -1;
-	private int mStatus = Downloadable.STATUS_UNKNOWN;
+	private int mStatus = Transferable.STATUS_UNKNOWN;
 	private Message message;
 	private String sessionId;
 	private Account account;
@@ -99,7 +98,7 @@ public class JingleConnection implements Downloadable {
 					file.delete();
 				}
 			}
-			Log.d(Config.LOGTAG,"sucessfully transmitted file:" + file.getAbsolutePath());
+			Log.d(Config.LOGTAG,"successfully transmitted file:" + file.getAbsolutePath()+" ("+file.getSha1Sum()+")");
 			if (message.getEncryption() != Message.ENCRYPTION_PGP) {
 				Intent intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
 				intent.setData(Uri.fromFile(file));
@@ -192,15 +191,15 @@ public class JingleConnection implements Downloadable {
 		} else {
 			response = packet.generateResponse(IqPacket.TYPE.ERROR);
 		}
-		account.getXmppConnection().sendIqPacket(response, null);
+		mXmppConnectionService.sendIqPacket(account,response,null);
 	}
 
 	public void init(Message message) {
 		this.contentCreator = "initiator";
 		this.contentName = this.mJingleConnectionManager.nextRandomId();
 		this.message = message;
-		this.message.setDownloadable(this);
-		this.mStatus = Downloadable.STATUS_UPLOADING;
+		this.message.setTransferable(this);
+		this.mStatus = Transferable.STATUS_UPLOADING;
 		this.account = message.getConversation().getAccount();
 		this.initiator = this.account.getJid();
 		this.responder = this.message.getCounterpart();
@@ -213,7 +212,7 @@ public class JingleConnection implements Downloadable {
 
 						@Override
 						public void onPrimaryCandidateFound(boolean success,
-								final JingleCandidate candidate) {
+															final JingleCandidate candidate) {
 							if (success) {
 								final JingleSocks5Transport socksConnection = new JingleSocks5Transport(
 										JingleConnection.this, candidate);
@@ -256,8 +255,8 @@ public class JingleConnection implements Downloadable {
 						packet.getFrom().toBareJid(), false);
 		this.message = new Message(conversation, "", Message.ENCRYPTION_NONE);
 		this.message.setStatus(Message.STATUS_RECEIVED);
-		this.mStatus = Downloadable.STATUS_OFFER;
-		this.message.setDownloadable(this);
+		this.mStatus = Transferable.STATUS_OFFER;
+		this.message.setTransferable(this);
         final Jid from = packet.getFrom();
 		this.message.setCounterpart(from);
 		this.account = account;
@@ -271,6 +270,9 @@ public class JingleConnection implements Downloadable {
 		this.mergeCandidates(JingleCandidate.parse(content.socks5transport()
 				.getChildren()));
 		this.fileOffer = packet.getJingleContent().getFileOffer();
+
+		mXmppConnectionService.sendIqPacket(account,packet.generateResponse(IqPacket.TYPE.RESULT),null);
+
 		if (fileOffer != null) {
 			Element fileSize = fileOffer.findChild("size");
 			Element fileNameElement = fileOffer.findChild("name");
@@ -366,7 +368,10 @@ public class JingleConnection implements Downloadable {
 					message, false);
 			if (message.getEncryption() == Message.ENCRYPTION_OTR) {
 				Conversation conversation = this.message.getConversation();
-				this.mXmppConnectionService.renewSymmetricKey(conversation);
+				if (!this.mXmppConnectionService.renewSymmetricKey(conversation)) {
+					Log.d(Config.LOGTAG,account.getJid().toBareJid()+": could not set symmetric key");
+					cancel();
+				}
 				content.setFileOffer(this.file, true);
 				this.file.setKey(conversation.getSymmetricKey());
 			} else {
@@ -381,6 +386,7 @@ public class JingleConnection implements Downloadable {
 				@Override
 				public void onIqPacketReceived(Account account, IqPacket packet) {
 					if (packet.getType() != IqPacket.TYPE.ERROR) {
+						Log.d(Config.LOGTAG,account.getJid().toBareJid()+": other party received offer");
 						mJingleStatus = JINGLE_STATUS_INITIATED;
 						mXmppConnectionService.markMessage(message, Message.STATUS_OFFERED);
 					} else {
@@ -395,14 +401,16 @@ public class JingleConnection implements Downloadable {
 	private List<Element> getCandidatesAsElements() {
 		List<Element> elements = new ArrayList<>();
 		for (JingleCandidate c : this.candidates) {
-			elements.add(c.toElement());
+			if (c.isOurs()) {
+				elements.add(c.toElement());
+			}
 		}
 		return elements;
 	}
 
 	private void sendAccept() {
 		mJingleStatus = JINGLE_STATUS_ACCEPTED;
-		this.mStatus = Downloadable.STATUS_DOWNLOADING;
+		this.mStatus = Transferable.STATUS_DOWNLOADING;
 		mXmppConnectionService.updateConversationUi();
 		this.mJingleConnectionManager.getPrimaryCandidate(this.account, new OnPrimaryCandidateFound() {
 			@Override
@@ -459,11 +467,11 @@ public class JingleConnection implements Downloadable {
 	}
 
 	private void sendJinglePacket(JinglePacket packet) {
-		account.getXmppConnection().sendIqPacket(packet, responseListener);
+		mXmppConnectionService.sendIqPacket(account,packet,responseListener);
 	}
 
 	private void sendJinglePacket(JinglePacket packet, OnIqPacketReceived callback) {
-		account.getXmppConnection().sendIqPacket(packet,callback);
+		mXmppConnectionService.sendIqPacket(account,packet,callback);
 	}
 
 	private boolean receiveAccept(JinglePacket packet) {
@@ -556,7 +564,7 @@ public class JingleConnection implements Downloadable {
 							.setAttribute("sid", this.getSessionId());
 					activation.query().addChild("activate")
 							.setContent(this.getCounterPart().toString());
-					this.account.getXmppConnection().sendIqPacket(activation,
+					mXmppConnectionService.sendIqPacket(account,activation,
 							new OnIqPacketReceived() {
 
 								@Override
@@ -633,7 +641,7 @@ public class JingleConnection implements Downloadable {
 		this.disconnectSocks5Connections();
 		this.mJingleStatus = JINGLE_STATUS_FINISHED;
 		this.message.setStatus(Message.STATUS_RECEIVED);
-		this.message.setDownloadable(null);
+		this.message.setTransferable(null);
 		this.mXmppConnectionService.updateMessage(message);
 		this.mJingleConnectionManager.finishConnection(this);
 	}
@@ -710,7 +718,7 @@ public class JingleConnection implements Downloadable {
 		if (this.transport != null && this.transport instanceof JingleInbandTransport) {
 			this.transport.disconnect();
 		}
-		this.message.setDownloadable(null);
+		this.message.setTransferable(null);
 		this.mJingleConnectionManager.finishConnection(this);
 	}
 
@@ -722,7 +730,7 @@ public class JingleConnection implements Downloadable {
 		this.sendCancel();
 		this.mJingleConnectionManager.finishConnection(this);
 		if (this.responder.equals(account.getJid())) {
-			this.message.setDownloadable(new DownloadablePlaceholder(Downloadable.STATUS_FAILED));
+			this.message.setTransferable(new TransferablePlaceholder(Transferable.STATUS_FAILED));
 			if (this.file!=null) {
 				file.delete();
 			}
@@ -730,7 +738,7 @@ public class JingleConnection implements Downloadable {
 		} else {
 			this.mXmppConnectionService.markMessage(this.message,
 					Message.STATUS_SEND_FAILED);
-			this.message.setDownloadable(null);
+			this.message.setTransferable(null);
 		}
 	}
 
@@ -742,7 +750,7 @@ public class JingleConnection implements Downloadable {
 		}
 		if (this.message != null) {
 			if (this.responder.equals(account.getJid())) {
-				this.message.setDownloadable(new DownloadablePlaceholder(Downloadable.STATUS_FAILED));
+				this.message.setTransferable(new TransferablePlaceholder(Transferable.STATUS_FAILED));
 				if (this.file!=null) {
 					file.delete();
 				}
@@ -750,7 +758,7 @@ public class JingleConnection implements Downloadable {
 			} else {
 				this.mXmppConnectionService.markMessage(this.message,
 						Message.STATUS_SEND_FAILED);
-				this.message.setDownloadable(null);
+				this.message.setTransferable(null);
 			}
 		}
 		this.mJingleConnectionManager.finishConnection(this);
@@ -948,24 +956,4 @@ public class JingleConnection implements Downloadable {
 	public int getProgress() {
 		return this.mProgress;
 	}
-
-	@Override
-	public String getMimeType() {
-		if (this.message.getType() == Message.TYPE_FILE) {
-			String mime = null;
-			String path = this.message.getRelativeFilePath();
-			if (path != null && !this.message.getRelativeFilePath().isEmpty()) {
-				mime = URLConnection.guessContentTypeFromName(this.message.getRelativeFilePath());
-				if (mime!=null) {
-					return  mime;
-				} else {
-					return "";
-				}
-			} else {
-				return "";
-			}
-		} else {
-			return "image/webp";
-		}
-	}
 }
diff --git a/src/main/java/eu/siacs/conversations/xmpp/jingle/JingleConnectionManager.java b/src/main/java/eu/siacs/conversations/xmpp/jingle/JingleConnectionManager.java
index 5dfa3ff4..cadf9df3 100644
--- a/src/main/java/eu/siacs/conversations/xmpp/jingle/JingleConnectionManager.java
+++ b/src/main/java/eu/siacs/conversations/xmpp/jingle/JingleConnectionManager.java
@@ -9,13 +9,13 @@ import android.annotation.SuppressLint;
 import android.util.Log;
 import eu.siacs.conversations.Config;
 import eu.siacs.conversations.entities.Account;
+import eu.siacs.conversations.entities.Transferable;
 import eu.siacs.conversations.entities.Message;
 import eu.siacs.conversations.services.AbstractConnectionManager;
 import eu.siacs.conversations.services.XmppConnectionService;
 import eu.siacs.conversations.utils.Xmlns;
 import eu.siacs.conversations.xml.Element;
 import eu.siacs.conversations.xmpp.OnIqPacketReceived;
-import eu.siacs.conversations.xmpp.jid.InvalidJidException;
 import eu.siacs.conversations.xmpp.jid.Jid;
 import eu.siacs.conversations.xmpp.jingle.stanzas.JinglePacket;
 import eu.siacs.conversations.xmpp.stanzas.IqPacket;
@@ -58,7 +58,12 @@ public class JingleConnectionManager extends AbstractConnectionManager {
 	}
 
 	public JingleConnection createNewConnection(Message message) {
+		Transferable old = message.getTransferable();
+		if (old != null) {
+			old.cancel();
+		}
 		JingleConnection connection = new JingleConnection(this);
+		mXmppConnectionService.markMessage(message,Message.STATUS_WAITING);
 		connection.init(message);
 		this.connections.add(connection);
 		return connection;
@@ -81,10 +86,10 @@ public class JingleConnectionManager extends AbstractConnectionManager {
 			return;
 		}
 		if (!this.primaryCandidates.containsKey(account.getJid().toBareJid())) {
-			final String proxy = account.getXmppConnection().findDiscoItemByFeature(Xmlns.BYTE_STREAMS);
+			final Jid proxy = account.getXmppConnection().findDiscoItemByFeature(Xmlns.BYTE_STREAMS);
 			if (proxy != null) {
 				IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
-				iq.setAttribute("to", proxy);
+				iq.setTo(proxy);
 				iq.query(Xmlns.BYTE_STREAMS);
 				account.getXmppConnection().sendIqPacket(iq,new OnIqPacketReceived() {
 
@@ -99,11 +104,11 @@ public class JingleConnectionManager extends AbstractConnectionManager {
 								candidate.setHost(host);
 								candidate.setPort(Integer.parseInt(port));
 								candidate.setType(JingleCandidate.TYPE_PROXY);
-								candidate.setJid(Jid.fromString(proxy));
+								candidate.setJid(proxy);
 								candidate.setPriority(655360 + 65535);
 								primaryCandidates.put(account.getJid().toBareJid(),candidate);
 								listener.onPrimaryCandidateFound(true,candidate);
-							} catch (final NumberFormatException | InvalidJidException e) {
+							} catch (final NumberFormatException e) {
 								listener.onPrimaryCandidateFound(false,null);
 								return;
 							}
diff --git a/src/main/java/eu/siacs/conversations/xmpp/jingle/JingleInbandTransport.java b/src/main/java/eu/siacs/conversations/xmpp/jingle/JingleInbandTransport.java
index 174f70fa..9a02ee7a 100644
--- a/src/main/java/eu/siacs/conversations/xmpp/jingle/JingleInbandTransport.java
+++ b/src/main/java/eu/siacs/conversations/xmpp/jingle/JingleInbandTransport.java
@@ -8,9 +8,12 @@ import java.security.NoSuchAlgorithmException;
 import java.util.Arrays;
 
 import android.util.Base64;
+import android.util.Log;
 
+import eu.siacs.conversations.Config;
 import eu.siacs.conversations.entities.Account;
 import eu.siacs.conversations.entities.DownloadableFile;
+import eu.siacs.conversations.persistance.FileBackend;
 import eu.siacs.conversations.utils.CryptoHelper;
 import eu.siacs.conversations.xml.Element;
 import eu.siacs.conversations.xmpp.OnIqPacketReceived;
@@ -22,7 +25,6 @@ public class JingleInbandTransport extends JingleTransport {
 	private Account account;
 	private Jid counterpart;
 	private int blockSize;
-	private int bufferSize;
 	private int seq = 0;
 	private String sessionId;
 
@@ -55,7 +57,6 @@ public class JingleInbandTransport extends JingleTransport {
 		this.account = connection.getAccount();
 		this.counterpart = connection.getCounterPart();
 		this.blockSize = blocksize;
-		this.bufferSize = blocksize / 4;
 		this.sessionId = sid;
 	}
 
@@ -94,11 +95,13 @@ public class JingleInbandTransport extends JingleTransport {
 			file.createNewFile();
 			this.fileOutputStream = file.createOutputStream();
 			if (this.fileOutputStream == null) {
+				Log.d(Config.LOGTAG,account.getJid().toBareJid()+": could not create output stream");
 				callback.onFileTransferAborted();
 				return;
 			}
 			this.remainingSize = this.fileSize = file.getExpectedSize();
 		} catch (final NoSuchAlgorithmException | IOException e) {
+			Log.d(Config.LOGTAG,account.getJid().toBareJid()+" "+e.getMessage());
 			callback.onFileTransferAborted();
 		}
     }
@@ -109,12 +112,17 @@ public class JingleInbandTransport extends JingleTransport {
 		this.onFileTransmissionStatusChanged = callback;
 		this.file = file;
 		try {
-			this.remainingSize = this.file.getSize();
+			if (this.file.getKey() != null) {
+				this.remainingSize = (this.file.getSize() / 16 + 1) * 16;
+			} else {
+				this.remainingSize = this.file.getSize();
+			}
 			this.fileSize = this.remainingSize;
 			this.digest = MessageDigest.getInstance("SHA-1");
 			this.digest.reset();
 			fileInputStream = this.file.createInputStream();
 			if (fileInputStream == null) {
+				Log.d(Config.LOGTAG,account.getJid().toBareJid()+": could no create input stream");
 				callback.onFileTransferAborted();
 				return;
 			}
@@ -123,6 +131,7 @@ public class JingleInbandTransport extends JingleTransport {
 			}
 		} catch (NoSuchAlgorithmException e) {
 			callback.onFileTransferAborted();
+			Log.d(Config.LOGTAG,account.getJid().toBareJid()+": "+e.getMessage());
 		}
 	}
 
@@ -146,32 +155,42 @@ public class JingleInbandTransport extends JingleTransport {
 	}
 
 	private void sendNextBlock() {
-		byte[] buffer = new byte[this.bufferSize];
+		byte[] buffer = new byte[this.blockSize];
 		try {
 			int count = fileInputStream.read(buffer);
 			if (count == -1) {
 				file.setSha1Sum(CryptoHelper.bytesToHex(digest.digest()));
-				fileInputStream.close();
 				this.onFileTransmissionStatusChanged.onFileTransmitted(file);
-			} else {
-				this.remainingSize -= count;
-				this.digest.update(buffer);
-				String base64 = Base64.encodeToString(buffer, Base64.NO_WRAP);
-				IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
-				iq.setTo(this.counterpart);
-				Element data = iq.addChild("data",
-						"http://jabber.org/protocol/ibb");
-				data.setAttribute("seq", Integer.toString(this.seq));
-				data.setAttribute("block-size",
-						Integer.toString(this.blockSize));
-				data.setAttribute("sid", this.sessionId);
-				data.setContent(base64);
-				this.account.getXmppConnection().sendIqPacket(iq,
-						this.onAckReceived);
-				this.seq++;
+				fileInputStream.close();
+				return;
+			} else if (count != buffer.length) {
+				int rem = fileInputStream.read(buffer,count,buffer.length-count);
+				if (rem > 0) {
+					count += rem;
+				}
+			}
+			this.remainingSize -= count;
+			this.digest.update(buffer,0,count);
+			String base64 = Base64.encodeToString(buffer,0,count, Base64.NO_WRAP);
+			IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
+			iq.setTo(this.counterpart);
+			Element data = iq.addChild("data", "http://jabber.org/protocol/ibb");
+			data.setAttribute("seq", Integer.toString(this.seq));
+			data.setAttribute("block-size", Integer.toString(this.blockSize));
+			data.setAttribute("sid", this.sessionId);
+			data.setContent(base64);
+			this.account.getXmppConnection().sendIqPacket(iq, this.onAckReceived);
+			this.seq++;
+			if (this.remainingSize > 0) {
 				connection.updateProgress((int) ((((double) (this.fileSize - this.remainingSize)) / this.fileSize) * 100));
+			} else {
+				file.setSha1Sum(CryptoHelper.bytesToHex(digest.digest()));
+				this.onFileTransmissionStatusChanged.onFileTransmitted(file);
+				fileInputStream.close();
 			}
 		} catch (IOException e) {
+			Log.d(Config.LOGTAG,account.getJid().toBareJid()+": "+e.getMessage());
+			FileBackend.close(fileInputStream);
 			this.onFileTransmissionStatusChanged.onFileTransferAborted();
 		}
 	}
@@ -180,14 +199,10 @@ public class JingleInbandTransport extends JingleTransport {
 		try {
 			byte[] buffer = Base64.decode(data, Base64.NO_WRAP);
 			if (this.remainingSize < buffer.length) {
-				buffer = Arrays
-						.copyOfRange(buffer, 0, (int) this.remainingSize);
+				buffer = Arrays.copyOfRange(buffer, 0, (int) this.remainingSize);
 			}
 			this.remainingSize -= buffer.length;
-
-
 			this.fileOutputStream.write(buffer);
-
 			this.digest.update(buffer);
 			if (this.remainingSize <= 0) {
 				file.setSha1Sum(CryptoHelper.bytesToHex(digest.digest()));
@@ -198,6 +213,8 @@ public class JingleInbandTransport extends JingleTransport {
 				connection.updateProgress((int) ((((double) (this.fileSize - this.remainingSize)) / this.fileSize) * 100));
 			}
 		} catch (IOException e) {
+			Log.d(Config.LOGTAG,account.getJid().toBareJid()+": "+e.getMessage());
+			FileBackend.close(fileOutputStream);
 			this.onFileTransmissionStatusChanged.onFileTransferAborted();
 		}
 	}
@@ -207,6 +224,7 @@ public class JingleInbandTransport extends JingleTransport {
 			if (!established) {
 				established = true;
 				connected = true;
+				this.receiveNextBlock("");
 				this.account.getXmppConnection().sendIqPacket(
 						packet.generateResponse(IqPacket.TYPE.RESULT), null);
 			} else {
diff --git a/src/main/java/eu/siacs/conversations/xmpp/jingle/JingleSocks5Transport.java b/src/main/java/eu/siacs/conversations/xmpp/jingle/JingleSocks5Transport.java
index c3419580..8d74f44e 100644
--- a/src/main/java/eu/siacs/conversations/xmpp/jingle/JingleSocks5Transport.java
+++ b/src/main/java/eu/siacs/conversations/xmpp/jingle/JingleSocks5Transport.java
@@ -1,16 +1,22 @@
 package eu.siacs.conversations.xmpp.jingle;
 
+import android.util.Log;
+
 import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
+import java.net.InetSocketAddress;
 import java.net.Socket;
+import java.net.SocketAddress;
 import java.net.UnknownHostException;
 import java.security.MessageDigest;
 import java.security.NoSuchAlgorithmException;
 import java.util.Arrays;
 
+import eu.siacs.conversations.Config;
 import eu.siacs.conversations.entities.DownloadableFile;
+import eu.siacs.conversations.persistance.FileBackend;
 import eu.siacs.conversations.utils.CryptoHelper;
 
 public class JingleSocks5Transport extends JingleTransport {
@@ -52,8 +58,9 @@ public class JingleSocks5Transport extends JingleTransport {
 			@Override
 			public void run() {
 				try {
-					socket = new Socket(candidate.getHost(),
-							candidate.getPort());
+					socket = new Socket();
+					SocketAddress address = new InetSocketAddress(candidate.getHost(),candidate.getPort());
+					socket.connect(address,Config.SOCKET_TIMEOUT * 1000);
 					inputStream = socket.getInputStream();
 					outputStream = socket.getOutputStream();
 					byte[] login = { 0x05, 0x01, 0x00 };
@@ -101,6 +108,7 @@ public class JingleSocks5Transport extends JingleTransport {
 					digest.reset();
 					fileInputStream = file.createInputStream();
 					if (fileInputStream == null) {
+						Log.d(Config.LOGTAG, connection.getAccount().getJid().toBareJid() + ": could not create input stream");
 						callback.onFileTransferAborted();
 						return;
 					}
@@ -120,31 +128,28 @@ public class JingleSocks5Transport extends JingleTransport {
 						callback.onFileTransmitted(file);
 					}
 				} catch (FileNotFoundException e) {
+					Log.d(Config.LOGTAG, connection.getAccount().getJid().toBareJid() + ": "+e.getMessage());
 					callback.onFileTransferAborted();
 				} catch (IOException e) {
+					Log.d(Config.LOGTAG, connection.getAccount().getJid().toBareJid() + ": "+e.getMessage());
 					callback.onFileTransferAborted();
 				} catch (NoSuchAlgorithmException e) {
+					Log.d(Config.LOGTAG, connection.getAccount().getJid().toBareJid() + ": "+e.getMessage());
 					callback.onFileTransferAborted();
 				} finally {
-					try {
-						if (fileInputStream != null) {
-							fileInputStream.close();
-						}
-					} catch (IOException e) {
-						callback.onFileTransferAborted();
-					}
+					FileBackend.close(fileInputStream);
 				}
 			}
 		}).start();
 
 	}
 
-	public void receive(final DownloadableFile file,
-			final OnFileTransmissionStatusChanged callback) {
+	public void receive(final DownloadableFile file, final OnFileTransmissionStatusChanged callback) {
 		new Thread(new Runnable() {
 
 			@Override
 			public void run() {
+				OutputStream fileOutputStream = null;
 				try {
 					MessageDigest digest = MessageDigest.getInstance("SHA-1");
 					digest.reset();
@@ -152,9 +157,10 @@ public class JingleSocks5Transport extends JingleTransport {
 					socket.setSoTimeout(30000);
 					file.getParentFile().mkdirs();
 					file.createNewFile();
-					OutputStream fileOutputStream = file.createOutputStream();
+					fileOutputStream = file.createOutputStream();
 					if (fileOutputStream == null) {
 						callback.onFileTransferAborted();
+						Log.d(Config.LOGTAG, connection.getAccount().getJid().toBareJid() + ": could not create output stream");
 						return;
 					}
 					double size = file.getExpectedSize();
@@ -165,6 +171,7 @@ public class JingleSocks5Transport extends JingleTransport {
 						count = inputStream.read(buffer);
 						if (count == -1) {
 							callback.onFileTransferAborted();
+							Log.d(Config.LOGTAG, connection.getAccount().getJid().toBareJid() + ": file ended prematurely with "+remainingSize+" bytes remaining");
 							return;
 						} else {
 							fileOutputStream.write(buffer, 0, count);
@@ -178,11 +185,16 @@ public class JingleSocks5Transport extends JingleTransport {
 					file.setSha1Sum(CryptoHelper.bytesToHex(digest.digest()));
 					callback.onFileTransmitted(file);
 				} catch (FileNotFoundException e) {
+					Log.d(Config.LOGTAG, connection.getAccount().getJid().toBareJid() + ": "+e.getMessage());
 					callback.onFileTransferAborted();
 				} catch (IOException e) {
+					Log.d(Config.LOGTAG, connection.getAccount().getJid().toBareJid() + ": "+e.getMessage());
 					callback.onFileTransferAborted();
 				} catch (NoSuchAlgorithmException e) {
+					Log.d(Config.LOGTAG, connection.getAccount().getJid().toBareJid() + ": "+e.getMessage());
 					callback.onFileTransferAborted();
+				} finally {
+					FileBackend.close(fileOutputStream);
 				}
 			}
 		}).start();
diff --git a/src/main/java/eu/siacs/conversations/xmpp/pep/Avatar.java b/src/main/java/eu/siacs/conversations/xmpp/pep/Avatar.java
index 9f5ac988..74da6a9b 100644
--- a/src/main/java/eu/siacs/conversations/xmpp/pep/Avatar.java
+++ b/src/main/java/eu/siacs/conversations/xmpp/pep/Avatar.java
@@ -6,6 +6,9 @@ import eu.siacs.conversations.xmpp.jid.Jid;
 import android.util.Base64;
 
 public class Avatar {
+
+	public enum Origin { PEP, VCARD };
+
 	public String type;
 	public String sha1sum;
 	public String image;
@@ -13,21 +16,14 @@ public class Avatar {
 	public int width;
 	public long size;
 	public Jid owner;
+	public Origin origin = Origin.PEP; //default to maintain compat
 
 	public byte[] getImageAsBytes() {
 		return Base64.decode(image, Base64.DEFAULT);
 	}
 
 	public String getFilename() {
-		if (type == null) {
-			return sha1sum;
-		} else if (type.equalsIgnoreCase("image/webp")) {
-			return sha1sum + ".webp";
-		} else if (type.equalsIgnoreCase("image/png")) {
-			return sha1sum + ".png";
-		} else {
-			return sha1sum;
-		}
+		return sha1sum;
 	}
 
 	public static Avatar parseMetadata(Element items) {
@@ -64,10 +60,43 @@ public class Avatar {
 					return null;
 				}
 				avatar.type = child.getAttribute("type");
-				avatar.sha1sum = child.getAttribute("id");
+				String hash = child.getAttribute("id");
+				if (!isValidSHA1(hash)) {
+					return null;
+				}
+				avatar.sha1sum = hash;
+				avatar.origin = Origin.PEP;
 				return avatar;
 			}
 		}
 		return null;
 	}
+
+	@Override
+	public boolean equals(Object object) {
+		if (object != null && object instanceof Avatar) {
+			Avatar other = (Avatar) object;
+			return other.getFilename().equals(this.getFilename());
+		} else {
+			return false;
+		}
+	}
+
+	public static Avatar parsePresence(Element x) {
+		String hash = x == null ? null : x.findChildContent("photo");
+		if (hash == null) {
+			return null;
+		}
+		if (!isValidSHA1(hash)) {
+			return null;
+		}
+		Avatar avatar = new Avatar();
+		avatar.sha1sum = hash;
+		avatar.origin = Origin.VCARD;
+		return avatar;
+	}
+
+	private static boolean isValidSHA1(String s) {
+		return s != null && s.matches("[a-fA-F0-9]{40}");
+	}
 }
diff --git a/src/main/java/eu/siacs/conversations/xmpp/stanzas/AbstractStanza.java b/src/main/java/eu/siacs/conversations/xmpp/stanzas/AbstractStanza.java
index 55256ece..bd706b57 100644
--- a/src/main/java/eu/siacs/conversations/xmpp/stanzas/AbstractStanza.java
+++ b/src/main/java/eu/siacs/conversations/xmpp/stanzas/AbstractStanza.java
@@ -51,4 +51,8 @@ public class AbstractStanza extends Element {
 			|| getTo().equals(account.getJid().toBareJid())
 			|| getTo().equals(account.getJid());
 	}
+
+	public boolean fromAccount(final Account account) {
+		return getFrom() != null && getFrom().toBareJid().equals(account.getJid().toBareJid());
+	}
 }
diff --git a/src/main/java/eu/siacs/conversations/xmpp/stanzas/MessagePacket.java b/src/main/java/eu/siacs/conversations/xmpp/stanzas/MessagePacket.java
index 93aaa68c..e32811af 100644
--- a/src/main/java/eu/siacs/conversations/xmpp/stanzas/MessagePacket.java
+++ b/src/main/java/eu/siacs/conversations/xmpp/stanzas/MessagePacket.java
@@ -1,5 +1,10 @@
 package eu.siacs.conversations.xmpp.stanzas;
 
+import android.util.Pair;
+
+import java.text.ParseException;
+
+import eu.siacs.conversations.parser.AbstractParser;
 import eu.siacs.conversations.xml.Element;
 
 public class MessagePacket extends AbstractStanza {
@@ -14,12 +19,7 @@ public class MessagePacket extends AbstractStanza {
 	}
 
 	public String getBody() {
-		Element body = this.findChild("body");
-		if (body != null) {
-			return body.getContent();
-		} else {
-			return null;
-		}
+		return findChildContent("body");
 	}
 
 	public void setBody(String text) {
@@ -66,4 +66,31 @@ public class MessagePacket extends AbstractStanza {
 			return TYPE_NORMAL;
 		}
 	}
+
+	public Pair<MessagePacket,Long> getForwardedMessagePacket(String name, String namespace) {
+		Element wrapper = findChild(name, namespace);
+		if (wrapper == null) {
+			return null;
+		}
+		Element forwarded = wrapper.findChild("forwarded", "urn:xmpp:forward:0");
+		if (forwarded == null) {
+			return null;
+		}
+		MessagePacket packet = create(forwarded.findChild("message"));
+		if (packet == null) {
+			return null;
+		}
+		Long timestamp = AbstractParser.getTimestamp(forwarded,null);
+		return new Pair(packet,timestamp);
+	}
+
+	public static MessagePacket create(Element element) {
+		if (element == null) {
+			return null;
+		}
+		MessagePacket packet = new MessagePacket();
+		packet.setAttributes(element.getAttributes());
+		packet.setChildren(element.getChildren());
+		return packet;
+	}
 }