Brought my 2007 white macbook in with a cracked top and failed trackpad. Turns out our battery #2 (first failed at 1.5yrs) had warped after a few months use and messed up the trackpad. They replaced it. Also they agreed to replace for free the whole top plastic and keyboard and trackpad. (Yes, i'm hoping quality control gets a LOT better from here out...) All works except gap between screen and keyb when closed is now pretty big. Odd. Since it was my wife who dropped it off, she didn't have admin passwd. Our main user is nonadmin. Genius guy asked her for it and then said nevermind they can "get around it". Somehow he enabled a guest account. How?