Ubuntu Intrepid hanging my Thinkpad X61.

While I was using the X61, it hung on me. Same type of hanging as the previous two, but this time the screen was on (on the previous two, the screen was blank because the lid was closed) since I was using it. I switched to another workspace and left it for a few seconds to watch TV but when I tried to move the trackpoint/mouse, bam! Dead machine. Normal temperature though.

Sigh... I'm suspecting either Transmission (bittorrent client) or the Vista partition being mounted (grin)... maybe even VLC 0.9.4, which was also left in memory (paused or stopped) when the hangs occurred.