It has to do with the overlay mode used by PowerDVD and other programs, and a conflict in the shadows used in ObjectDock. Now I'm no programmer and I just read alot of stuff on the net. Nothing bar closing down objectdock to watch a DVD will work.
Hopefully Stardock will chose to fix this problem in a later release. I like using PowerDVD to watch my DVD's and closing down OD is a little annoying.
Darkslide