Hey, I've had my lap top for about two months now. For a Mac its had a lot of bad luck (within a month the hard drive had a glitch and had to be replaced) and I've already had to replace the adapter part of my charger once before. So, a few minutes ago I was in my downstairs on my lap top and the charger was working just fine; now that I have come upstairs I have tried every plug in my room and it is not working again!?! Has anybody else been having a lot of difficulty's with these recent chargers? If you have any insight on this, please tell me! I would prefer not to tell my mother that once again I need to go to the apple store and have them replace that adapter! (Thank goodness for my one year warranty!)