Mac OS X - Widgets disappearing if using Phonon video and setMask together

[lood.at.qtdev]

Hi!

I've got an issue on Mac. I want to use video playback on my window and for design I'm masking the window to have a nice rounded shape. But after starting the video some buttons disappeared on the leave event, and they never came back...

I've tried to solve that problem with repainting the disappearing widgets on any event or repeatedly in small intervals. But this is a very "cheap' solution and it turned out, that it's not working in any cases.

When I don't use setMask everything works fine.

Any ideas to get around with Phonon and masking?

Thx
Ben