uncharted 2"freezing issues"

[drummerboy]

Hey there guys, i dont want to sound like a sook, but is there any one having freezing issues with this game.In chapter 4 "the dig" i cant seem to get past the grenade cut scene which freezes on me. I have 2 consoles being 60gb orig model and the slim line model and it is freezing in the same scene in both players.I have taken the game back to where i purchased it and they have replaced the game for me with a new disc and still the same problem. So far it sounds like a firmware problem. I am just wondering if anyone else is experiencing this issue Regards Grassy