A great deal of good wisdom here, people, i keep checking here but now it seems its my turn to ask a question: My black MB, OSX 10.5.5: A few days ago noticed high fan noise from my dear MB, started paying attention, Activity Monitor revealed that Mail, whenever started is using 100+ of the CPU... satying that way until shut down. Overall stable, but still very unusual, i dont want to fry the thing just by using my mail. I am using Mail for business and personal, it is seeing my entire Gmail account (IMAP) plus a business POP account. Gmail has 10K plus of uread messages, but the point is, this was not happening, behaving like this before. What on Earth happened? Please do not suggest for me to clean my mailbox, etc., or reinstall anything, I was starting out a few month ago from a clean install... Thanks and cheers!