I got a new Powerbook and I was so happy that you can't hear any noise at all, but then when I have worked a while the ventilator (shhhhhh sound) start working. Even do this sound is lighter than my older powerbook, when I feel the computer it feels very warm. If I pick up the computer from the table and put it on my lap it seems that it gets less warm and the ventilator stops. Does anybody knows how this ventilator works, it seems now I don't like the computer to be on the table, I was wondering on buying like a stand so there will be space under the computer. Any advice?