willybfriendly - 7:16 am on Feb 23, 2010 (gmt 0)
Can't be of any help, though I look forward to what you find. I had a laptop about 1.5 year ago that was doing the same thing as you describe. I almost floated it off the top of a parking garage in Vegas I was so frustrated with it after it gave me grief during a presentation at a shareholder annual meeting.
Never did figure out what was going on. The machine in question died to a faulty power switch not too long after. (I think it was an HP if memory serves.)