java.lang.ClassCastException: java.desktop/javax.swing.text.AbstractDocument$DefaultDocumentEventUndoableWrapper cannot be cast to java.desktop/javax.swing.text.AbstractDocument$DefaultDocumentEvent
   at org.netbeans.modules.bugtracking.commons.UndoRedoSupport$CompoundUndoManager.undoableEditHappened(UndoRedoSupport.java:161)
   at javax.swing.text.AbstractDocument.fireUndoableEditUpdate(AbstractDocument.java:293)
   at javax.swing.text.AbstractDocument.handleRemove(AbstractDocument.java:632)
   at javax.swing.text.AbstractDocument.remove(AbstractDocument.java:596)
   at javax.swing.text.AbstractDocument.replace(AbstractDocument.java:672)
   at javax.swing.text.JTextComponent.setText(JTextComponent.java:1719)
   at org.netbeans.modules.bugzilla.issue.IssuePanel.reloadField(IssuePanel.java:838)
   at org.netbeans.modules.bugzilla.issue.IssuePanel.reloadField(IssuePanel.java:822)
   at org.netbeans.modules.bugzilla.issue.IssuePanel.reloadForm(IssuePanel.java:609)
   at org.netbeans.modules.bugzilla.issue.IssuePanel$6.run(IssuePanel.java:342)
   at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:313)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:759)
   at java.awt.EventQueue.access$500(EventQueue.java:97)
   at java.awt.EventQueue$3.run(EventQueue.java:712)
   at java.awt.EventQueue$3.run(EventQueue.java:706)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:88)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:729)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:159)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:199)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:90)