I just sat down to watch my recently purchased copy of The Core and about a third of the way through (Chapter 11) it started freezing up on me. Have any of you heard or seen this? I checked the disk - it looks fine. I tried restarting it and it happened again. Is it the disk or the dvd player? I'm running an Hitachi DVP725U. Any help would be appreciated. (And it just started to get interesting).