Mac Mini (CoreSolo) kernel panics every night like clockwork

Question

My new CoreSolo mini seems to kernel panic every night. Each morning, i find it displaying the 'reboot your computer' screen. The system.log is not particularly illuminating:
Apr 10 23:32:36 the-computer mdimportserver[780]: NSDataMessageStore: couldn't find body
Apr 10 23:32:36 the-computer mdimportserver[780]: NSDataMessageStore: couldn't find body
Apr 10 23:32:36 the-computer mdimportserver[780]: NSDataMessageStore: couldn't find body
Apr 10 23:36:21 the-computer kernel[0]: AFP_VFS afpfs_unmount: /Volumes/Mac HD (56GB), flags 0, pid 799
Apr 11 00:39:30 the-computer /Applications/Safari.app/Contents/MacOS/Safari: Corrupt JPEG data: premature end of data segment\n
Apr 11 01:38:20 the-computer kernel[0]: AFPSleepWakeHandler: going to sleep
Apr 11 11:35:19 localhost kernel[0]: hi mem tramps at 0xffe00000
Apr 11 11:35:20 localhost kernel[0]: PAE enabled
Apr 11 11:35:20 localhost kernel[0]: standard timeslicing quantum is 10000 us
Basically, the last thing on the log last night was me putting it to sleep at 1:38AM, and then me at 11:35AM the next morning rebooting it because it was frozen.
This has happened almost every day this week. I have to hold down the power button to get it to shut off before rebooting.
I've run memtest in single user mode on the RAM (2GB), and it has passed over 7 runs without a hitch.
Any ideas? I'm already thinking of getting Apple to exchange this unit due to excessive fan noise, so maybe this is related. Overheating?

Answer 1

The one thing about lion preinstalled is, You can run disk utilities from the restore partition by holding down the R key at startup or run aht by holding down the D key at startup. And it's still under warranty for a year after purchase. If all else fails you can do a restore. If the apple store gets it, that's most likely what they will do. So you'd have to backup anything you want to keep.