Same problem for us as everyone else! If you save over a previous save, you never know where you are going to be restored to! I was restored back to a spot where the door was locked and I couldn't proceed. Also have experienced lock up on restore and one time my last save was blown away. Funny that all the problem seem to be with save/restore. I haven't had any issues with the game play. I've just taken to saving often and having a long list of saves.
