Crash reports include stacks like this one

Exception in NSApplicationAWT:
 java.lang.NullPointerException
at java.desktop/sun.lwawt.macosx.CPlatformComponent.setBounds(CPlatformComponent.java:66)
at java.desktop/sun.lwawt.LWComponentPeer.setBounds(LWComponentPeer.java:595)
at java.desktop/sun.lwawt.LWWindowPeer.notifyReshape(LWWindowPeer.java:730)
at java.desktop/sun.lwawt.macosx.CPlatformWindow.deliverMoveResizeEvent(CPlatformWindow.java:1208)

0 CoreFoundation 0x00007fff204ba6af __exceptionPreprocess + 242
1 libobjc.A.dylib 0x00007fff201f23c9 objc_exception_throw + 48
2 CoreFoundation 0x00007fff204e2a9a -[NSException raise] + 9
3 JavaNativeFoundation 0x00007fff6f6b106b JNFCallVoidMethod + 215
4 libawt_lwawt.dylib 0x0000000110d30c82 -[AWTWindow _deliverMoveResizeEvent] + 375
5 CoreFoundation 0x00007fff20435fec __CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__ + 12
6 CoreFoundation 0x00007fff204d189b ___CFXRegistrationPost_block_invoke + 49
7 CoreFoundation 0x00007fff204d180f _CFXRegistrationPost + 454
8 CoreFoundation 0x00007fff20406bde _CFXNotificationPost + 723
9 Foundation 0x00007fff21175abe -[NSNotificationCenter postNotificationName:object:userInfo:] + 59
10 AppKit 0x00007fff22cb0120 -[NSWindow _setFrameCommon:display:fromServer:] + 3179
11 AppKit 0x00007fff22de7d2c -[NSWindow _setFrameAfterMove:] + 768
12 AppKit 0x00007fff22de78a0 -[NSWindow _windowMovedToRect:] + 167
13 AppKit 0x00007fff22de76a6 -[NSWindow _windowMoved:] + 1086
14 AppKit 0x00007fff22de7245 -[NSWindow _internalHandleAppKitDefinedEvent:] + 239
15 AppKit 0x00007fff22de6480 -[NSWindow(NSEventRouting) _reallySendEvent:isDelayedEvent:] + 3706
16 AppKit 0x00007fff22de53ea -[NSWindow(NSEventRouting) sendEvent:] + 347
17 libawt_lwawt.dylib 0x0000000110d2ede3 -[AWTWindow_Normal sendEvent:] + 86
18 AppKit 0x00007fff22de412a -[NSApplication(NSEvent) sendEvent:] + 2742
19 libjcef.dylib 0x0000000150ab4051 -[NSApplication(JCEFApplication) _swizzled_sendEvent:] + 97
20 libosxapp.dylib 0x0000000110dfe736 -[NSApplicationAWT sendEvent:] + 450
21 AppKit 0x00007fff230bc36e -[NSApplication _handleEvent:] + 65
22 AppKit 0x00007fff22c4cb2f -[NSApplication run] + 623
23 libosxapp.dylib 0x0000000110dfe3a5 +[NSApplicationAWT runAWTLoopWithApp:] + 222
24 libawt_lwawt.dylib 0x0000000110d5fed6 +[AWTStarter starter:headless:] + 834
25 JavaNativeFoundation 0x00007fff6f6b470f +[JNFRunLoop _performCopiedBlock:] + 15
26 Foundation 0x00007fff211ec4d9 __NSThreadPerformPerform + 204
27 CoreFoundation 0x00007fff20440a0c __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
28 CoreFoundation 0x00007fff20440974 __CFRunLoopDoSource0 + 180
29 CoreFoundation 0x00007fff204406ef __CFRunLoopDoSources0 + 248
30 CoreFoundation 0x00007fff2043f121 __CFRunLoopRun + 890
31 CoreFoundation 0x00007fff2043e6ce CFRunLoopRunSpecific + 563
32 idea 0x000000010cd1abf5 main + 332
33 libdyld.dylib 0x00007fff20363621 start + 1
34 ??? 0x0000000000000001 0x0 + 1


I have not been able to reproduce the problem, but the number of reports like the above is in the hundreds.