Some things with the physics needs to be done in the openGL thread, I wonder if thats your problem…
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# Java VM: Java HotSpot(TM) Client VM (11.0-b16 mixed mode, sharing windows-x86)
# Problematic frame:
# C [atioglxx.dll+0x1ab749]
#
# If you would like to submit a bug report, please visit:
# http://java.sun.com/webapps/bugreport/crash.jsp
# The crash happened outside the Java Virtual Machine in native code.
# See problematic frame for where to report the bug.
#