Display issues while using OpenVG and native Symbian camera api.

Details:
The screen is not properly refreshed if camera is initialized and multiple updates are requested.
It seems like surface painting is affected (vector painting always work as expected).

Workaround:
Switch to any other display mode (i.e. call QApplication::setGraphicsSystem(QString("raster"))).

Expected result:
Two pictures displyed interchangable over the time (see TestApp)

Result:
One picture displayed properly, second frame not displayed at all.

Repro:
5/10. If not reproducing pls try restarting phone - actually it is 0/10 or 9/10.

TestApp:
Test app pre loads two images and displays them on the screen interchangable. The pictures are swapped each 50 displays (so first frame is displeyd 50 times than second than first etc.)
Update is called at the end of each paint method.