I've got the free trial of PDVD6 and while I was watching the incredibles, I noticed that the picture/sound stuttered quite badly on two occassions for several seconds (about 20sec total each time). Eventually it stopped but began again about 15 minutes later. It doesn't seem to be the movie because I tried several other DVDs and they all had the same problem.
I'm running:
XP + sp2 P4 512mb 3.1 Ghz 60Gb HDD
Sincerely,
William