Fix issue #687 looses track of some chat windows (when using separate window for every chat).

src/net/java/sip/communicator/impl/gui/main/chat/ChatWindow.java

@@ -477,6 +477,47 @@ public ChatPanel getCurrentChatPanel()
         return null;
     }
 
+    /**
+     * Returns the currently available chat panels.
+     *
+     * @return the currently available chat panels.
+     */
+    public java.util.List<ChatPanel> getChatPanels()
+    {
+        ArrayList<ChatPanel> chatPanels = new ArrayList<ChatPanel>();
+
+        if(getChatTabCount() > 0)
+        {
+            int componentCount = chatTabbedPane.getComponentCount();
+
+            for (int i = 0; i < componentCount; i ++)
+            {
+                Component c = chatTabbedPane.getComponent(i);
+
+                if(c instanceof ChatPanel)
+                {
+                    chatPanels.add((ChatPanel)c);
+                }
+            }
+        }
+        else
+        {
+            int componentCount = mainPanel.getComponentCount();
+
+            for (int i = 0; i < componentCount; i ++)
+            {
+                Component c = mainPanel.getComponent(i);
+
+                if(c instanceof ChatPanel)
+                {
+                    chatPanels.add((ChatPanel)c);
+                }
+            }
+        }
+
+        return chatPanels;
+    }
+
     /**
      * Returns the tab count of the chat tabbed pane. Meant to be used when in
      * "Group chat windows" mode.

src/net/java/sip/communicator/impl/gui/main/chat/ChatWindowManager.java

@@ -982,12 +982,14 @@ private boolean containsChat(ChatPanel chatPanel)
      */
     private void disposeChatWindow(ChatWindow chatWindow)
     {
-        for (ChatPanel chatPanel : chatPanels)
+        List<ChatPanel> chatPanelsToDispose = chatWindow.getChatPanels();
+
+        for (ChatPanel chatPanel : chatPanelsToDispose)
             chatPanel.dispose();
 
         synchronized (chatPanels)
         {
-            chatPanels.clear();
+            chatPanels.removeAll(chatPanelsToDispose);
         }
 
         if (chatWindow.getChatCount() > 0)