java.lang.AbstractMethodError: org.netbeans.modules.bugtracking.kenai.spi.KenaiAccessor.addPropertyChangeListener(Ljava/beans/PropertyChangeListener;)V
   at org.netbeans.modules.bugtracking.kenai.KenaiRepositories.addPropertyChangeListener(KenaiRepositories.java:118)
   at org.netbeans.modules.bugtracking.api.RepositoryManager.<init>(RepositoryManager.java:84)
   at org.netbeans.modules.bugtracking.api.RepositoryManager.getInstance(RepositoryManager.java:93)
   at org.netbeans.modules.tasks.ui.DashboardTopComponent.componentOpened(DashboardTopComponent.java:210)
   at org.openide.windows.WindowManager.componentOpenNotify(WindowManager.java:307)
   at org.netbeans.core.windows.WindowManagerImpl.notifyTopComponentOpened(WindowManagerImpl.java:1140)
   at org.netbeans.core.windows.Central.addModeOpenedTopComponent(Central.java:798)
   at org.netbeans.core.windows.ModeImpl.addOpenedTopComponent(ModeImpl.java:354)
   at org.netbeans.core.windows.PersistenceHandler.initModeFromConfig(PersistenceHandler.java:451)
   at org.netbeans.core.windows.PersistenceHandler.load(PersistenceHandler.java:214)
   at org.netbeans.core.windows.WindowSystemImpl.load(WindowSystemImpl.java:81)
   at org.netbeans.core.GuiRunLevel$InitWinSys.run(GuiRunLevel.java:231)
   at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:666)
   at java.awt.EventQueue.access$400(EventQueue.java:81)
   at java.awt.EventQueue$2.run(EventQueue.java:627)
   at java.awt.EventQueue$2.run(EventQueue.java:625)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:636)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:158)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)