I've made a genius bar appointment but I was wondering, has anyone else had problems with chargers. I'm not sure what it is with this one but it keeps over heating the side of the macbook its on and saying not charging on the battery status. The charger is the newer smaller kind. When I got my macbook it came with the ones with white plastic ends instead of aluminium but on one the wire popped out and on the other a pin got pushed in, so they replaced the later one with the new one and I've only been having problems with it. What should I say when I go to the genius bar?