java.lang.ClassCastException: com.sun.scenario.effect.impl.j2d.J2DMergePeer cannot be cast to com.sun.scenario.effect.impl.j2d.rsl.RSLEffectPeer
at com.sun.scenario.effect.impl.j2d.rsl.RSLRenderer.dispose(Unknown Source)
at com.sun.scenario.effect.impl.j2d.rsl.RSLRenderer$1.onDeviceReset(Unknown Source)
at sun.java2d.pipe.hw.AccelDeviceEventNotifier.notifyListeners(Unknown Source)
at sun.java2d.pipe.hw.AccelDeviceEventNotifier.eventOccured(Unknown Source)
at sun.awt.windows.WToolkit.eventLoop(Native Method)
at sun.awt.windows.WToolkit.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)

Reported in a comment to this blog:
http://weblogs.java.net/blog/campbell/archive/2009/01/effects_in_java.html