Camera viewfinder doesn't work correctly in Symbian^3 N8 device

In S^3 N8 device camera viewfinder widget fills whole screen even it's not in fullscreen mode. Camera widget can be small and viewable but everything else on the screen is painted white. Any other component can't be shown on top of camera view. This can be easily reproduced with Qt-mobility camera example. This worked earlier at least in Qt-mobility beta 1.0.0 version.