(1) I have an Ethernet (RJ45) connection and disconnected all USBs while still occurring.
(2) I thought about the heat. Weird is that yesterday worked well for hours while downloading 10 songs at a time and having a few more apps open (fans were working hard at this time). Today after 20 min of being started it went to sleep as I was writing an email (quiet fans). I will watch the temp and the rev. when I go back home, but I bought it here in Switzerland on October’04 from the ch applepage, so from what you say it must be rev A.
P