I just got a mac mini on thursday, went on a small trip on friday-sunday. When i came home to my sleeping mac mini and woke it, it made a TERRIBLY loud fan clicking noise. My old PB 12" made this noise after I had dropped it on floor from about 3 feet. I didnt drop my mac mini, i barely used it for 2 hours before i had to leave on my trip. The sound eventually goes away though, once the mini heats up a little i guess. So i'm pretty convinced it's the fan, but why would it suddenly do this? Anyone else have this problem or a solution?