I minimized Sins and tried to watch a video. The video on media player stayed black (sound played though). So I closed Sins, restarted Windows Media Player and tried again and the video worked. When I went to see if I could replicate the error, I ran sins again, minimized it, brought it back up again, then tried to minimize it again... and that's where it got real nasty. The sound went wonky and kinda gave me a buzzing sound. It eventually worked itself out with Sins crashing (but this took a couple minutes to happen). Windows media player had to be closed with task manager.

Happens with both AVI and MPEG formats. The second time I did it Windows media player didn't have to be forceably closed but it did have to be restarted before displaying video (sound kept working throughout).

Only tested on Windows Media Player... I don't think I have any other movie players installed.