I recently installed the newest firmware update. it makes my macbook run cooler but the fan is constantly on. its kind of loud but it doesnt bother me as long as i know its normal. so thats what im wondering. has this happened you all who have macbooks? i guess i could just tell people i took the Flowmaster mufflers off my car and put them in my computer for a nice custom sound. EDIT: now that i think about it i installed 2 gigs of ram recently replacing the 512 stock ram (g.skill from newegg 667 5400 1 gig stick x 2) im not sure if that makes it run hot enough for the fan to be on like that?