So I tightened it, and then yesterday I noticed its gone. It looks as if the hole was stripped from the factory and the screw was barely staying in. So now I get to go to the Apple store tomorrow and see what they will do. It's only two weeks old. I realize its just a single screw, but for $2,000 am I asking too much? If it is stripped, all they can do is replace the case or the entire computer.