Since building my new computer, I've encountered an issue where the upper-right hand corner of most video play back is lagged by a fraction of a second, making anything unwatchable. I downloaded a more recent CCCP and it went away -- untill I tried to watch a DVD with WMP. The problem doesn't happen in PowerDVD, but PowerDVD doesn't playback propperly on my second screen. I've noticed that PowerDVD uses FFDshow, the same as most any video file playback will on my computer, so maybe that's the difference.

AMD Athlon XP X2 4600+
MSI K9N4 SLI
EVGA GF8800GTS 640MB

Also, it's PowerDVD 4.0, if you have a work arround for that instead.