Literally, I have the MB UB late 2008 version and I wanted to swap the hard drive for an SSD. I'm sure I used the right screwdriver, anyway I've wrecked the screw and have tried everything to remove it Called Apple Care and the rep was sympathetic, taking it to the store tomorrow as it's my day off. I don't have an appointment as they're all full. Hope they take a look at it for me. I feel so incompetent!