java.lang.IllegalStateException: Assertion failed. WindowsAPI is required to be called from AWT thread only, see http://core.netbeans.org/proposals/threading/
        at org.netbeans.core.windows.WindowManagerImpl.assertEventDispatchThreadWeak(WindowManagerImpl.java:1438)
        at org.netbeans.core.windows.WindowManagerImpl.getMainWindow(WindowManagerImpl.java:142)
        at org.netbeans.modules.collab.provider.im.ui.ServerStatusPanel.createDialog(ServerStatusPanel.java:257)
        at org.netbeans.modules.collab.provider.im.ui.ServerStatusPanel.<init>(ServerStatusPanel.java:81)
        at org.netbeans.modules.collab.provider.im.IMReconnect.showStatusDialog(IMReconnect.java:119)
        at org.netbeans.modules.collab.provider.im.IMReconnect.addElem(IMReconnect.java:108)
        at org.netbeans.modules.collab.provider.im.IMReconnect.startReconnect(IMReconnect.java:101)
        at org.netbeans.modules.collab.provider.im.IMCollabSession.onError(IMCollabSession.java:661)
        at org.netbeans.lib.collab.xmpp.XMPPSession$CollaborationSessionNotifier.run(XMPPSession.java:3633)
        at org.netbeans.lib.collab.util.Worker.run(Worker.java:222)
        at java.lang.Thread.run(Thread.java:619)