I wish I could reproduce this bug :-( Does it only lock up if you run certain programs? Does it still crash if you just boot and do nothing?
hmm move mouse.. lockup.
start owb look at a page.. lockup.
its not a particular app, its everything and its not something thats 100% reproducable. it may be 10 seconds or 10 minutes. I've even had it idle from login, so doing nothing will make it lockup.
this is under virtualbox, settings 1 cpu, 1gb ram.
sometimes I download and run it hosted under linux version and its even worse there. often I see corrupt list messages spewing on the console. so I know there is some wild pointer memory writing going on somewhere..