I just upgraded the hard drive in my 17" iMac G5 to a 250GB from the standard 80GB. Instead of creating an image to restore it, I started from scratch and reinstalled OS X from the original disc and then upgraded it to tiger, which I was also running on the old 80GB. Anyway, now probably 80% of the time when I wake the computer from sleep, I get the "You must restart you computer" message in many languages. The only time it crashes is waking from sleep. Its not everytime, but random and more than half the time. I think it might only happen when the computer goes to sleep by itself, but I'm not sure because it hasn't been running very long. I already tried reinstalling a second time because I thought maybe something went wrong during installation. This hard drive has been in for about one week.
Does anyone have any ideas on what could be causing this? I've thought about setting it to not sleep, but I'd rather find out what is causing the problem. Thanks in advance