So my hard drive crashed a little while ago and before that Skyrim worked just fine. So I sent it in, got a new hard drive and now my PS3 works again. But now, Skyrim is all messed up! What is wrong is while I am walking around, the ground will be gone in some areas but the trees will still be there floating in mid air. Also, when I quick travel to places like Solitude I just fall in a open void and then die at of no where. Someone please help! I don't know what it would be! HELP!!!

Delete the game data (not your saves) and reinstall.

sounds like someones been hitting the skooma a little too hard