I started a thread not to long ago saying that after the 10.6.7 update i noticed the fans were like jet engines when just watching basic videos. This is not the case, I just restored my macbook pro from a time machine backup which still had Firefox 3.6 on it and 10.6.6 update and everything was running smoothly again. I've just updated Firefox to number 4 and all the excessive heating and fan noise is back.
I hope this helps some of you that might of been having the same problems.
I hope this helps some of you that might of been having the same problems.