qmediaplayer: Video display vanishes after orientation switch

Device: 5800
Firmware version: V 21.0.017SC
Release: qt-symbian-opensource-4.6.0-snapshot-20091111.exe
Platform: Qt libs: pre-built, examples/demos: release-gcce
Compiler used: default GCCE
Application: qmediaplayer demo
Launched from: Fluidlauncher
Problem description:

Steps to reproduce:
1) Open qmediaplayer demo in landscape mode
2) Open a video file via "open file..." menu item
3) Let video file play through
5) Open the same video file again via "open file..." menu item
6) Let video file play through
7) Change display orientation to portrait -> video no longer visible.
8) Tap play -> You can hear the sound but nothing is visible