Sporadically I am getting an exception in Swing related to an invalid cast: 

Exception in thread "AWT-EventQueue-0" java.lang.ClassCastException: 
sun.awt.image.BufImgSurfaceData cannot be cast to sun.java2d.xr.XRSurfaceData 
        at 
sun.java2d.xr.XRPMBlitLoops.cacheToTmpSurface(XRPMBlitLoops.java:148) 
        at sun.java2d.xr.XrSwToPMBlit.Blit(XRPMBlitLoops.java:356) 
        at sun.java2d.pipe.DrawImage.blitSurfaceData(DrawImage.java:959) 
        at sun.java2d.pipe.DrawImage.renderImageCopy(DrawImage.java:577) 
        at sun.java2d.pipe.DrawImage.copyImage(DrawImage.java:67) 
        at sun.java2d.pipe.DrawImage.copyImage(DrawImage.java:1014) 
        at sun.java2d.SunGraphics2D.drawImage(SunGraphics2D.java:3318) 
        at 
sun.awt.image.ImageRepresentation.drawToBufImage(ImageRepresentation.java:813) 

        at sun.java2d.pipe.DrawImage.copyImage(DrawImage.java:1021) 
        at sun.java2d.SunGraphics2D.drawImage(SunGraphics2D.java:3318) 
        at sun.java2d.SunGraphics2D.drawImage(SunGraphics2D.java:3296) 
        at javax.swing.ImageIcon.paintIcon(ImageIcon.java:425) 
        at 
javax.swing.plaf.basic.BasicTreeUI.drawCentered(BasicTreeUI.java:1617) 
        at 
javax.swing.plaf.basic.BasicTreeUI.paintExpandControl(BasicTreeUI.java:1501) 
        at javax.swing.plaf.basic.BasicTreeUI.paint(BasicTreeUI.java:1220) 
        at javax.swing.plaf.metal.MetalTreeUI.paint(MetalTreeUI.java:169) 
        at javax.swing.plaf.ComponentUI.update(ComponentUI.java:161) 
        at javax.swing.JComponent.paintComponent(JComponent.java:780) 
        at javax.swing.JComponent.paint(JComponent.java:1056) 
        at javax.swing.JComponent.paintToOffscreen(JComponent.java:5210) 
        at 
javax.swing.BufferStrategyPaintManager.paint(BufferStrategyPaintManager.java:2 
90) 
        at javax.swing.RepaintManager.paint(RepaintManager.java:1272) 
        at javax.swing.JComponent._paintImmediately(JComponent.java:5158) 
        at javax.swing.JComponent.paintImmediately(JComponent.java:4969) 
        at javax.swing.RepaintManager$4.run(RepaintManager.java:831) 
        at javax.swing.RepaintManager$4.run(RepaintManager.java:814) 
        at java.security.AccessController.doPrivileged(Native Method) 
        at 
java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege( 
ProtectionDomain.java:80) 
        at 
javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:814) 
        at 
javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:789) 
        at 
javax.swing.RepaintManager.prePaintDirtyRegions(RepaintManager.java:738) 
        at javax.swing.RepaintManager.access$1200(RepaintManager.java:64) 
        at 
javax.swing.RepaintManager$ProcessingRunnable.run(RepaintManager.java:1732) 
        at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311) 
        at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:756) 
        at java.awt.EventQueue.access$500(EventQueue.java:97) 
        at java.awt.EventQueue$3.run(EventQueue.java:709) 
        at java.awt.EventQueue$3.run(EventQueue.java:703) 
        at java.security.AccessController.doPrivileged(Native Method) 
        at 
java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege( 
ProtectionDomain.java:80) 
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:726) 
        at 
java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:2 
01) 
        at 
java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116) 

        at 
java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:1 
05) 
        at 
java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101) 
        at 
java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93) 
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)