Anyone else having any heat issues with their Mac Mini's? I'm a little worried about mine, which seems to generate a fair bit of heat. It's been on constantly pretty much for the last couple of days, as i've often left it converting movies etc on Handbrake while i've been asleep and at work. It does seem to be generating a fair bit of heat, and both Handbrake and Mac The Ripper appear to be running alot slower today than they were when i first bought the machine last week.. Is this is a genuine problem, or am i just being paranoid? Would it be worth leaving the Mini off for a night or two to give it time to "rest" or should it be able to be left on for long periods without issues?