Is the iMac overheating?

The iMac might not have been designed to stay ON 24/7. via gigaom.

Gigaom is reporting that the Apple iMac might be overheating because employees leave their computers powered all the time.

I agree that it’s a compact design, but I leave my notebook on all the time, and it does not really crash.

If this is true, the size cannot be an excuse here.