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Filter duplicating events on message wiating indication.
Jabber sometimes shows "apos;" instead of "'", must be fixed now.

src/net/java/sip/communicator/impl/protocol/jabber/OperationSetBasicInstantMessagingJabberImpl.java

@@ -498,7 +498,16 @@ public void registrationStateChanged(RegistrationStateChangeEvent evt)
                                 OperationSetPersistentPresence.class);
 
                 if(smackMessageListener == null)
+                {
                     smackMessageListener = new SmackMessageListener();
+                }
+                else
+                {
+                    // make sure this listener is not already installed in this
+                    // connection
+                    jabberProvider.getConnection()
+                        .removePacketListener(smackMessageListener);
+                }
 
                 jabberProvider.getConnection().addPacketListener(
                         smackMessageListener,
@@ -633,6 +642,12 @@ public void processPacket(Packet packet)
                         // removes body end tag
                         .replaceAll("\\</[bB][oO][dD][yY].*?>","");
 
+                    // for some reason &apos; is not rendered correctly
+                    // from our ui, lets use its equivalent. Other
+                    // similar chars(< > & ") seem ok. 
+                    receivedMessage =
+                            receivedMessage.replaceAll("&apos;", "&#39;");
+
                     newMessage =
                         createMessage(receivedMessage, HTML_MIME_TYPE);
                 }

src/net/java/sip/communicator/impl/protocol/sip/OperationSetMessageWaitingSipImpl.java

@@ -81,6 +81,22 @@ public class OperationSetMessageWaitingSipImpl
             messageWaitingNotificationListeners
                 = new HashMap<MessageType,
                               List<MessageWaitingListener>>();
+    /**
+     * Number of unread messages, count so we don't duplicate events.
+     */
+    private int unreadMessages = 0;
+    /**
+     * Number of old messages, count so we don't duplicate events.
+     */
+    private int readMessages = 0;
+    /**
+     * Number of unread urgent messages, count so we don't duplicate events.
+     */
+    private int unreadUrgentMessages = 0;
+    /**
+     * Number of old urgent messages, count so we don't duplicate events.
+     */
+    private int readUrgentMessages = 0;
 
     /**
      * Creates this operation set.
@@ -238,6 +254,25 @@ private void fireVoicemailNotificationEvent(
         int unreadUrgentMessages,
         int readUrgentMessages)
     {
+        synchronized(this)
+        {
+            if(this.unreadMessages == unreadMessages
+                && this.readMessages == readMessages
+                && this.unreadUrgentMessages == unreadUrgentMessages
+                && this.readUrgentMessages == readUrgentMessages)
+            {
+                // no new information skip event;
+                return;
+            }
+            else
+            {
+                this.unreadMessages = unreadMessages;
+                this.readMessages = readMessages;
+                this.unreadUrgentMessages = unreadUrgentMessages;
+                this.readUrgentMessages = readUrgentMessages;
+            }
+        }
+
         MessageType msgType = MessageType.valueOfByType(msgTypeStr);
         MessageWaitingEvent event =
             new MessageWaitingEvent(

src/net/java/sip/communicator/impl/protocol/sip/ProtocolProviderServiceSipImpl.java

@@ -2022,6 +2022,9 @@ void initOutboundProxy(SipAccountID accountID, int ix)
                 }
             }
 
+            if(proxySocketAddress == null)
+                throw new UnknownHostException();
+
             proxyAddress = proxySocketAddress.getAddress();
             proxyPort = proxySocketAddress.getPort();
 

src/net/java/sip/communicator/impl/protocol/sip/SipStackSharing.java

@@ -1075,7 +1075,14 @@ private void dirtyHacks(RequestEvent event)
                     return;
                 }
             }
+        }
+        catch(Throwable ex)
+        {
+            logger.warn("Cannot apply incoming request modification!", ex);
+        }
 
+        try
+        {
             // using asterisk voice mail initial notify for messages
             // is ok, but on the fly received messages their notify comes
             // without subscription-state, so we add it in order to be able to