so i've just turned my macbook on and started browsing the internet. just had safari on, with say 3 windows max at one point, but most of the time one. all of a sudden a big surge of fan power started to kick in. i checked istat and my cpu was up to 75degrees and my fans getting faster and louder, up to about 6500rpm. i now have two windows open in safari and its currently 62degrees and the fans are still kicking up a fuss at about 4500rpm. maybe it's mad because it saw the new macbooks on the macrumors home page, who knows. but seriously, what gives? i've had tons of stuff open before and not heard a whisper out of my fans. any help?