I use a ricoh mp5125a, TDK +RW or +R, dvddecrypter and windvdcopy platinum (it compresses and burns)
Occasionally I get the same problem I think about 2-3 out of over 200 discs.
Recently I had a problem with Startrek IV with a +RW freezing, skipping and pixelating.
First I did a reburn - didnt work then I did a re-rip and burned again - still no good. I even tried DVD2ONE instead of windvdcopy.
Then I used another TDK disc - no problem.
Media differ from burner to burner - it may be a bad disk or maybe your burner just doesn't like ritek.