To reproduce:
1) Open the attached FX project (TestFileChooserV2.zip)
2) Run it : you get a window with a "Choose File" button (see TestFileChooserV2.png)
3) Click on the "Choose File" button
=> the JVM crashes (see the output below).

The crash also occurs with Scene Builder 1.0 b50.

In both cases:
JavaFX 2.2.0-b21
JDK 1.7.0_06-b23

Note : if you run the test program again, then the crash does not occur anymore.



Output displayed at crash time:

Initializing controller...
2012-08-08 22:58:00.545 java[3512:707] Invalid URL passed to an open/save panel: '/Users/mochich/Desktop/TestFileChooserV2'. Using 'file://localhost/Users/mochich/Desktop/Unlock/src/unlock/' instead.
2012-08-08 22:58:03.836 java[3512:707] unrecognized type is -2
2012-08-08 22:58:03.836 java[3512:707] *** Assertion failure in -[NSEvent _initWithCGSEvent:eventRef:], /SourceCache/AppKit/AppKit-1187/AppKit.subproj/NSEvent.m:1348
2012-08-08 22:58:03.837 java[3512:707] An uncaught exception was raised
2012-08-08 22:58:03.838 java[3512:707] Invalid parameter not satisfying: cgsEvent.type > 0 && cgsEvent.type <= kCGSLastEventType
2012-08-08 22:58:03.841 java[3512:707] (
0 CoreFoundation 0x00007fff8e463716 __exceptionPreprocess + 198
1 libobjc.A.dylib 0x00007fff8bfa9470 objc_exception_throw + 43
2 CoreFoundation 0x00007fff8e463558 +[NSException raise:format:arguments:] + 104
3 Foundation 0x00007fff8cdae962 -[NSAssertionHandler handleFailureInMethod:object:file:lineNumber:description:] + 189
4 AppKit 0x00007fff873dfd2c -[NSEvent _initWithCGSEvent:eventRef:] + 2782
5 AppKit 0x00007fff8765dd9a +[NSEvent eventWithCGEvent:] + 243
6 libglass.dylib 0x0000000167ccf02f listenTouchEvents + 31
7 CoreGraphics 0x00007fff893bba91 processEventTapData + 150
8 CoreGraphics 0x00007fff893bb8e4 _CGYPostEventTapData + 189
9 CoreGraphics 0x00007fff89662a65 _XPostEventTapData + 107
10 CoreGraphics 0x00007fff89662b5d CGYEventTap_server + 106
11 CoreGraphics 0x00007fff893bb9d2 eventTapMessageHandler + 30
12 CoreFoundation 0x00007fff8e3d2b50 __CFMachPortPerform + 288
13 CoreFoundation 0x00007fff8e3d2a19 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 41
14 CoreFoundation 0x00007fff8e3d2759 __CFRunLoopDoSource1 + 153
15 CoreFoundation 0x00007fff8e4058bf __CFRunLoopRun + 1775
16 CoreFoundation 0x00007fff8e404dd2 CFRunLoopRunSpecific + 290
17 Foundation 0x00007fff8ce3cace -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 268
18 libglass.dylib 0x0000000167cba8c4 +[GlassApplication enterNestedEventLoopWithEnv:] + 132
19 libglass.dylib 0x0000000167cbe4f3 -[DialogDispatcher runModal] + 163
20 Foundation 0x00007fff8ce2e450 -[NSObject(NSThreadPerformAdditions) performSelector:onThread:withObject:waitUntilDone:modes:] + 212
21 Foundation 0x00007fff8ce2e2f8 -[NSObject(NSThreadPerformAdditions) performSelectorOnMainThread:withObject:waitUntilDone:] + 131
22 libglass.dylib 0x0000000167cbe9e5 Java_com_sun_glass_ui_mac_MacCommonDialogs__1showFileOpenChooser + 981
23 ??? 0x0000000101d7bf90 0x0 + 4325883792
)
2012-08-08 22:58:03.842 java[3512:707] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Invalid parameter not satisfying: cgsEvent.type > 0 && cgsEvent.type <= kCGSLastEventType'
*** First throw call stack:
(
0 CoreFoundation 0x00007fff8e463716 __exceptionPreprocess + 198
1 libobjc.A.dylib 0x00007fff8bfa9470 objc_exception_throw + 43
2 CoreFoundation 0x00007fff8e463558 +[NSException raise:format:arguments:] + 104
3 Foundation 0x00007fff8cdae962 -[NSAssertionHandler handleFailureInMethod:object:file:lineNumber:description:] + 189
4 AppKit 0x00007fff873dfd2c -[NSEvent _initWithCGSEvent:eventRef:] + 2782
5 AppKit 0x00007fff8765dd9a +[NSEvent eventWithCGEvent:] + 243
6 libglass.dylib 0x0000000167ccf02f listenTouchEvents + 31
7 CoreGraphics 0x00007fff893bba91 processEventTapData + 150
8 CoreGraphics 0x00007fff893bb8e4 _CGYPostEventTapData + 189
9 CoreGraphics 0x00007fff89662a65 _XPostEventTapData + 107
10 CoreGraphics 0x00007fff89662b5d CGYEventTap_server + 106
11 CoreGraphics 0x00007fff893bb9d2 eventTapMessageHandler + 30
12 CoreFoundation 0x00007fff8e3d2b50 __CFMachPortPerform + 288
13 CoreFoundation 0x00007fff8e3d2a19 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 41
14 CoreFoundation 0x00007fff8e3d2759 __CFRunLoopDoSource1 + 153
15 CoreFoundation 0x00007fff8e4058bf __CFRunLoopRun + 1775
16 CoreFoundation 0x00007fff8e404dd2 CFRunLoopRunSpecific + 290
17 Foundation 0x00007fff8ce3cace -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 268
18 libglass.dylib 0x0000000167cba8c4 +[GlassApplication enterNestedEventLoopWithEnv:] + 132
19 libglass.dylib 0x0000000167cbe4f3 -[DialogDispatcher runModal] + 163
20 Foundation 0x00007fff8ce2e450 -[NSObject(NSThreadPerformAdditions) performSelector:onThread:withObject:waitUntilDone:modes:] + 212
21 Foundation 0x00007fff8ce2e2f8 -[NSObject(NSThreadPerformAdditions) performSelectorOnMainThread:withObject:waitUntilDone:] + 131
22 libglass.dylib 0x0000000167cbe9e5 Java_com_sun_glass_ui_mac_MacCommonDialogs__1showFileOpenChooser + 981
23 ??? 0x0000000101d7bf90 0x0 + 4325883792
)
libc++abi.dylib: terminate called throwing an exception
Java Result: 134