The crash below seems Mac specific (doesn't occur on Win).

2012-12-04 15:48:50.486 java[5877:707] *** Assertion failure in -[NSMenuItem initWithTitle:action:keyEquivalent:], /SourceCache/AppKit/AppKit-1187.34/Menus.subproj/NSMenuItem.m:319
2012-12-04 15:48:50.486 java[5877:707] Apple AWT Internal Exception: Invalid parameter not satisfying: aString != nil
2012-12-04 15:48:50.487 java[5877:707] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Invalid parameter not satisfying: aString != nil'
*** First throw call stack:
(
0 CoreFoundation 0x00007fff85b560a6 __exceptionPreprocess + 198
1 libobjc.A.dylib 0x00007fff885953f0 objc_exception_throw + 43
2 CoreFoundation 0x00007fff85b55ee8 +[NSException raise:format:arguments:] + 104
3 Foundation 0x00007fff85cb96a2 -[NSAssertionHandler handleFailureInMethod:object:file:lineNumber:description:] + 189
4 AppKit 0x00007fff8795f572 -[NSMenuItem initWithTitle:action:keyEquivalent:] + 143
5 libglass.dylib 0x0000000159e85c3c -[GlassMenu initWithJavajdelegate:jtitle:jshortcut:jmodifiers:jicon:jenabled:jchecked:jcallback:] + 316
6 libglass.dylib 0x0000000159e85fe3 Do_com_sun_glass_ui_mac_MacMenuDelegate__1createMenuItem + 115
7 libglass.dylib 0x0000000159e8739a Java_com_sun_glass_ui_mac_MacMenuDelegate__1createMenuItem + 394
8 ??? 0x000000010ad77cd8 0x0 + 4476861656
9 ??? 0x000000010ad6b175 0x0 + 4476809589
)
libc++abi.dylib: terminate called throwing an exception
Java Result: 134