Hey all just wanted to lend a hand if this happens to anyone else so you dont have to keep talking to Apple or going to Apple store. I upgraded from Jag 10.2.8 to 10.3.1 and the next day found my comp had stopped charging overnight and was down to 60% power. Took the adapter to Apple store and they said definitly flawed and they would replace it. Got a new one, used it for a day and it seemed to work fine, next day it was off again....reset it by unplugging and replugging into the wall.....went dead again after work. Figured what the hell I'll reset PMU and since then it hasn't died so apparently if this happens thats all you have to do. The instructions are up at apple, think its option+cmnd+ctrl+power button with machine off and hold for 5 seconds.