Ye my friend has the same problem. His problem is: When he puts Black Ops in his Slim PS3 it takes time for it to show up on the GAME list, and when he loads the game it glitches a lot (freezing, gets pixelated, skipping, sound messes up, etc.), then finally freezes the PS3 and he has to turn it off.
The solutions we tried and have not worked for us are:
-Tried loading game every day for the past month
-Cleaned game disc
-Used a different Black Ops game disc (5 different discs)
-Deleted patches
-Deleted saves
-Restored original settings
-Formatted PS3
-Tried other games, all works perfectly, only Black Ops doesn't work
So now we are very puzzled. Every other game works, and Black Ops doesn't work by trying every way we could think of. Isn't there a solution other then get a new PS3 (not worth it just for Black Ops)?