Crash when using FileDialog on Mac OS X

Using FileDialog on Mac OS X 10.8/10.9 crashes all the time when following these steps:

• Click on the search button to popup the search dialog
• Add text in the filter bar in the top right like 'mp3'.\
• Wait for the results to appear then cancel.
• Click once again on the search button and it crashes

Crash stack:
Starting /Users/XXX/Qt5.1.1/5.1.1/clang_64/bin/qmlscene /Users/XXX/Workspace/qt5-demoProjects/tstOpenFile/tstOpenFile.qml
2013-11-04 11:06 qmlscene[61517] (CarbonCore.framework) FSEventStreamStart: register_with_server: ERROR: f2d_register_rpc() => (null) (-21)
QFileInfo::absolutePath: Constructed with empty filename
QFileSystemWatcher::removePaths: list is empty
2013-11-04 11:06:59.632 qmlscene[61517:707] An uncaught exception was raised
2013-11-04 11:06:59.632 qmlscene[61517:707] *** -[NSURL initFileURLWithPath:]: nil string parameter
2013-11-04 11:06:59.674 qmlscene[61517:707] (
0 CoreFoundation 0x00007fff8f3bab06 __exceptionPreprocess + 198
1 libobjc.A.dylib 0x00007fff8787c3f0 objc_exception_throw + 43
2 CoreFoundation 0x00007fff8f3ba8dc +[NSException raise:format:] + 204
3 Foundation 0x00007fff8f6eee07 -[NSURL(NSURL) initFileURLWithPath:] + 81
4 Foundation 0x00007fff8f6eed07 +[NSURL(NSURL) fileURLWithPath:] + 43
5 libqcocoa.dylib 0x0000000103a2c813 -[QNSOpenSavePanelDelegate showWindowModalSheet:] + 227
6 libqcocoa.dylib 0x0000000103a2f6f1 _ZN22QCocoaFileDialogHelper4showE6QFlagsIN2Qt10WindowTypeEENS1_14WindowModalityEP7QWindow + 97
7 libdialogplugin.dylib 0x0000000102fe5d47 _ZN20QQuickAbstractDialog10setVisibleEb + 247
8 libdialogplugin.dylib 0x0000000102feb521 _ZN20QQuickAbstractDialog11qt_metacallEN11QMetaObject4CallEiPPv + 97
9 libdialogplugin.dylib 0x0000000102fea2d6 _ZN24QQuickAbstractFileDialog11qt_metacallEN11QMetaObject4CallEiPPv + 38
10 QtQml 0x00000001004f97a3 ZL10CallMethodP7QObjectiiiPiP9QV8EngineRN12_GLOBAL_N_18CallArgsE + 3299
11 QtQml 0x00000001004f88bf ZL11CallPreciseP7QObjectRK16QQmlPropertyDataP9QV8EngineRN12_GLOBAL_N_18CallArgsE + 991
12 QtQml 0x00000001004f14d2 _ZN17QV8QObjectWrapper6InvokeERKN2v89ArgumentsE + 1634
13 QtV8 0x0000000101840f9b ZN2v88internalL21Builtin_HandleApiCallENS0_12_GLOBAL_N_116BuiltinArgumentsILNS0_21BuiltinExtraArgumentsE1EEEPNS0_7IsolateE + 459
14 ??? 0x000038b7ac50618e 0x0 + 62361521119630
)
2013-11-04 11:06:59.675 qmlscene[61517:707] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[NSURL initFileURLWithPath:]: nil string parameter'

• • • First throw call stack:
      (
      0 CoreFoundation 0x00007fff8f3bab06 __exceptionPreprocess + 198
      1 libobjc.A.dylib 0x00007fff8787c3f0 objc_exception_throw + 43
      2 CoreFoundation 0x00007fff8f3ba8dc +[NSException raise:format:] + 204
      3 Foundation 0x00007fff8f6eee07 -[NSURL(NSURL) initFileURLWithPath:] + 81
      4 Foundation 0x00007fff8f6eed07 +[NSURL(NSURL) fileURLWithPath:] + 43
      5 libqcocoa.dylib 0x0000000103a2c813 -[QNSOpenSavePanelDelegate showWindowModalSheet:] + 227
      6 libqcocoa.dylib 0x0000000103a2f6f1 _ZN22QCocoaFileDialogHelper4showE6QFlagsIN2Qt10WindowTypeEENS1_14WindowModalityEP7QWindow + 97
      7 libdialogplugin.dylib 0x0000000102fe5d47 _ZN20QQuickAbstractDialog10setVisibleEb + 247
      8 libdialogplugin.dylib 0x0000000102feb521 _ZN20QQuickAbstractDialog11qt_metacallEN11QMetaObject4CallEiPPv + 97
      9 libdialogplugin.dylib 0x0000000102fea2d6 _ZN24QQuickAbstractFileDialog11qt_metacallEN11QMetaObject4CallEiPPv + 38
      10 QtQml 0x00000001004f97a3 ZL10CallMethodP7QObjectiiiPiP9QV8EngineRN12_GLOBAL_N_18CallArgsE + 3299
      11 QtQml 0x00000001004f88bf ZL11CallPreciseP7QObjectRK16QQmlPropertyDataP9QV8EngineRN12_GLOBAL_N_18CallArgsE + 991
      12 QtQml 0x00000001004f14d2 _ZN17QV8QObjectWrapper6InvokeERKN2v89ArgumentsE + 1634
      13 QtV8 0x0000000101840f9b ZN2v88internalL21Builtin_HandleApiCallENS0_12_GLOBAL_N_116BuiltinArgumentsILNS0_21BuiltinExtraArgumentsE1EEEPNS0_7IsolateE + 459
      14 ??? 0x000038b7ac50618e 0x0 + 62361521119630
      )
      libc++abi.dylib: terminate called throwing an exception
      The program has unexpectedly finished.
      /Users/XXX/Qt5.1.1/5.1.1/clang_64/bin/qmlscene exited with code 0