Spellchecker Bug: Java AWT-EventQueue-1 - null pointer exception

Exception in thread "AWT-EventQueue-1" java.lang.NullPointerException
at javax.swing.text.DefaultHighlighter.addHighlight(Unknown Source)
at org.dts.spell.swing.ErrorMarker.markError(ErrorMarker.java:189)
at org.dts.spell.swing.ErrorMarker.markError(ErrorMarker.java:201)
at org.dts.spell.swing.event.RealTimeSpellCheckerListener$1.run(RealTimeSpellCheck erListener.java:62)
at java.awt.event.InvocationEvent.dispatch(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at org.jivesoftware.sparkimpl.plugin.idle.UserIdlePlugin$1.dispatchEvent(UserIdleP lugin.java:159)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)

I'm seeing a lot of errors being generated in the error.log with regards to the above error message on the 12/24 SVN build.

I'm also seeing repeated attempts to access C:\temp\e4j_p3816.tmp and if I place a dummy file there it deletes it.