AWT-EventQueue-0 error on form show

[pbromwell]

I've added a form onto a module that's getting a weird error after the onShow method. The form is displayed on a tabless panel, and the form itself has two tabless panels for displaying fields.

Servoy Server version: 6.1.6
Java Web Start 1.6.0_65
Using JRE version 1.6.0_65-b14-462-11M4609 Java HotSpot(TM) 64-Bit Server VM

Error:
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at javax.swing.SwingUtilities.computeIntersection(SwingUtilities.java:470)
at javax.swing.RepaintManager$3.run(RepaintManager.java:808)
at javax.swing.RepaintManager$3.run(RepaintManager.java:802)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:86)
at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:802)
at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:745)
at com.servoy.j2db.util.gui.OverlapRepaintManager.paintDirtyRegions(OverlapRepaintManager.java:102)
at javax.swing.RepaintManager.prePaintDirtyRegions(RepaintManager.java:725)
at javax.swing.RepaintManager.access$1000(RepaintManager.java:46)
at javax.swing.RepaintManager$ProcessingRunnable.run(RepaintManager.java:1680)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:715)
at java.awt.EventQueue.access$400(EventQueue.java:82)
at java.awt.EventQueue$2.run(EventQueue.java:676)
at java.awt.EventQueue$2.run(EventQueue.java:674)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:86)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:685)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:296)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:211)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:196)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:188)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)

I'm looking either for a fix or a known cause of it. If you need more information, let me know.

EDIT: One workaround I found was to place the form in a modal dialog, which doesn't throw the error and my form works fine. This will not work as a permanent solution that can be rolled out to our users, though.