I was doing my semi-regular battery callibration last night, and ran the battery down until the computer went to sleep, and then left it like that until it turned off. I then plugged it in to charge for 8 hours or so. I noticed immediately that the charge status light was green as soon as I plugged in the adaptor, but thought nothing of it. 8 hours later, I turned on the laptop (while plugged in). The battery status icon has an x through it, and when I click it, it says "No batteries available". I have removed and re-inserted the battery. Also, when I press the button on the battery that tells you how charged it is, the first light flashes repeatedly. This is a 2.0 GHz Core Duo (not C2D) MacBook. Anyone have any ideas? Apple phone support is closed for new years.