JDeveloper NullPointerException at View Component Palette

Hi everybody...
The JDeveloper 9.0.3 is throwing an exception when I try to view the Component palette from the main menu or Ctrl+Shift+P command.
The exception is as following:
java.lang.NullPointerException
     void oracle.ideimpl.palette.PaletteImpl.populate()
          PaletteImpl.java:240
     void oracle.ideimpl.palette.PaletteWindowImpl.checkIfPopulated()
          PaletteWindowImpl.java:323
     void oracle.ideimpl.palette.PaletteWindowImpl.show()
          PaletteWindowImpl.java:364
     boolean oracle.ideimpl.palette.PaletteManagerImpl.handleEvent(oracle.ide.IdeAction, oracle.ide.addin.Context)
          PaletteManagerImpl.java:174
     void oracle.ide.IdeAction$1.run()
          IdeAction.java:579
     void java.awt.event.InvocationEvent.dispatch()
          InvocationEvent.java:154
     void java.awt.EventQueue.dispatchEvent(java.awt.AWTEvent)
          EventQueue.java:337
     boolean java.awt.EventDispatchThread.pumpOneEventForHierarchy(java.awt.Component)
          EventDispatchThread.java:131
     void java.awt.EventDispatchThread.pumpEventsForHierarchy(java.awt.Conditional, java.awt.Component)
          EventDispatchThread.java:98
     void java.awt.EventDispatchThread.pumpEvents(java.awt.Conditional)
          EventDispatchThread.java:93
     void java.awt.EventDispatchThread.run()
          EventDispatchThread.java:85
Thanks
What can I do to fix it?
Rafael

BUMP
Just wanted to inform that I ran into the same problem. Derek's solution solved my problem. I noticed that before applying this fix my own palette.xml was 0 bytes in size.
Using JDev 9.0.3.3 on a W2K3 TS.

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java.lang.NullPointerException
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     void oracle.ideimpl.palette.PaletteWindowImpl.checkIfPopulated()
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