QVideoWidget::setFullScreen() is broken

calling setFulscreen functionality stops playing the video and pops up a blank widget.

To reproduce:
Run qtmultimedia/examples/multimediawidgets/player" example.
Select any mp4 video to play
While playing a video, click FullScreen button
the player stops and popup a blank dialog.

If you look into application aoutput pan of Qt Creator you see following messages
QMediaPlaylistNavigator: Jump outside playlist range
QBackingStore::flush() called with non-exposed window, behavior is undefined
QBackingStore::flush() called with non-exposed window, behavior is undefined

player[36232:903] *** __NSAutoreleaseNoPool(): Object 0x102c03750 of class __NSCFType autoreleased with no pool in place - just leaking
2013-01-03 15:46:42.051 player[36232:903] *** __NSAutoreleaseNoPool(): Object 0x102c03750 of class __NSCFType autoreleased with no pool in place - just leaking