Has this been happening to anybody else on here? I performed the new leopard update just last night and now when I am watching a youtube video (or any other streaming video of a few minutes in length or longer) my MB fan goes wild and the CPU temp rises to 175 degrees! That is the highest it has ever gone to in it's existence. I bought it 3 months ago and never had this problem until just now. I have a Blackbook with the SR 2.2 and 1gb ram. I bought it "stock" and upgraded no hardware/software when I bought it. Is there a way to downgrade to the 10.5.1 so I don't have to put up with this and wait till Apple corrects the problem? There is no doubt in my mind that this is related to the update. I do the same types of stuff nightly with my MB and all of the sudden I am getting this fan noise and heat, coincidentally, right after a major update. I see a 100% correlation here. I can't call apple as my 90 days of tech support just ran out! Please advise. Any input will be much appreciated. <---sad, and mad!