Got my MPR about 2 weeks ago and was very pleased with it . Great Hi screen, low temps n noise, great performance....until. Some days ago when conected to internet the mackbok just freezes. first one app, then all the rest till I hit the reset buton. Just the colored status ball keeps spining. This hapen 1/2 times a day. and I think only when I´m on internet. At first I thought it could be the browser, so decided to use camino instead of safari but the problem remains with bowth browsers. . Its my first mac and one of the things I had in mind was the "sistem stability"...oh well Is there any way of tracking the problem (app or OS X tool) ? may it be an hardware problem and should I sent it back to apple? I don´t want to send it back but there is no way to continue like this. thanks for any help and sorry the bad english.