I'm not used to this. (i meant my FAN is running all the time!) None of my iBooks or old Tibooks had this issue -- especially should have had this issue with the Ti's but I didn't because I put them on a Macally ice pad stand that has air flow channels. Well, this 12" runs hot. I know that this is not good for any machine. Where is the intake? Where is the fan blowing? I am not happy because the more the fan goes, the faster this new little thing ages the hard drive and CPU. Any suggestions on how to keep it cooler? Are your 12" PB fans running constantly?