I have a run of the mill emachines system with xp home sp2. I don't think other than Whidbey I have anything remarkable installed that I can think of and I think but am not sure it did this before Whidbey.
The symptoms of the problem is a generally blank (black or green) screen for the video. Sometimes the sound plays sometimes not. This seems to happen in any copy program as well as any of the players as you would expect. remove AnyDvd and the problem goes away. I suppose it is possible that it is the dvd drive, I have never tried it with the writer I don't think, but it always plays without AnyDvd.
I have tried this off and on for a long while, probably 6 months at least so I don;t think it is some new "encryption" thing not to mention that the players always seem to work and shrink works.
It isn't that big of a thing for me, just interesting.