I've never really had a problem with my macbook, but for the last two weeks or so, I can't watch any Flash videos like YouTube. It'll work for about fifteen or so seconds and then the whole thing will start skipping and the whole computer acts choppy. Firefox (or Safari) CPU usage spikes, and the computer gets really hot. Then I'll have to wait for a minute or so for the macbook to cool off before I can use it. I've tried downgrading from Flash 10 to Flash 9 -- no better. I have the original Macbook, with GMA integrated graphics. This problem is really annoying, does anyone have any idea what's going on?