So you're saying that when you overclock too high, the phone will just reboot itself? Thats handy.
Is overclocking in this ROMs settings?
[I kind of made a mini-thread inside this ROM's thread, I feel like an ass.]
I wouldn't worry, it's not the official aosp rom forum.
The settings are in the cyanogen settings section under Settings/Cyanogen/Performance.
It will reboot, but note, if you click set on reboot, you'll be in an endless reboot unless you have a nandroid backup.