Sorry if this has been posted already but... I was using my macbook pro 2.2 today while unplugged, then once i plugged it in when it was low, i noticed the fans sped up to about 3500 - 4000 rpm. I looked in the iStat widget and i guess the highest temp was the memory control, it was about 60c. Is this normal to happen? If so, can someone explain why?