TODO: Remove fast forward/backward icon

[BUG:2010-08-12-01] Fast forward/backward error

1. if you press the fast backward continuously.
play stopped. play must go on...

[BUG-2010081101] ScreenClue Playing

Process:
1. Play to preview a recoreded file
2. close preview window.
3. Do not close Main ScreenClue window.
4. Record screen.
5. preview but video image did not show.