Very strange problem started to occur last night. And it happened on 4 different DVD-R disks. I just bought a Denon DVD-900 player Saturday. We were watching a DVD-R disk on the new Denon and it started to get corrupt data, skipping, and finally locked up. I put the disk in my $80 Toshiba player and it played that section just fine. But in about 20 minutes it started doing the same thing. So each time one of the players would start messing up I would pop the disk out and stick it in the other DVD player. I can't see how it is the disk because each time it messed up I would put it in the other player and that section of the disk would start playing just fine. Any thoughts?