My new Powerbook speaker output is very lopsided. Very little comes out of the right speaker, and much comes out of the left. It is a new 15" PB. Only the real highs seem to come out of the right speaker. I read in onne other place that the PB speakers are lopsided like this, but I want to make sure mine are not defective. To those of you with new 15" PBs, if you put your ear to the left speaker and then the right speaker, do you notice this difference?