OK- I have a week and a half old BlackBook. Just tonight up in in the menu bar it says the battery isn't charging. I looked up the issue in "help" and it says that the power source I'm using isn't strong enough to charge the battery, but I've plugged it in everywhere in the house and the office and nothing works. It worked fine this afternoon. Time to go to the genius bar? And yes, I've restarted and reseated the battery.