I've been running my powerbook 5,8 all day but when i don't use it for a while, like an hour or so, i find it frozen. I can't even reset, only turn it off. Someone else with similar experience ?
I have no fancy software installed (not yet), only plain MorphOS 3.2 + a few apps from Grunch (mplayer, frying pan, etc). Of course it's hard to get a log in such a situation. It happened 3 times already today.

I had the same problem until I uninstalled Helios with Grunch.

You might want to check whether you have it installed too.