Thanks for the reassurance. After running it on down->down->down for about 12 hours after that without incident, I'm reasonably sure everything is working well.

The only other wierdness I'm experiencing is that my Mk2 with 32 meg isn't resuming visuals on bootup (3.0 Alpha 8) even though I've set it in Hijack. Wierd. I'll fiddle with it some more.