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java.lang.NullPointerException: 	at org.jivesoftware.spark.ui.ContactList.updateUserPresence(ContactList.java:275)	at org.jivesoftware.spark.ui.ContactList.access$700(ContactList.java:96)	at org.jivesoftware.spark.ui.ContactList$19$4$1.run(ContactList.java:1637)	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)	at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173)	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)	at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)