I just received my iMac C2D 2.0 with 20" screen. After booting it up and leaving it warm up for 20 mins, a green stuck pixel appeared in the upper part of the screen, especially when the back ground is black. When I switched to FrontRow, that green pixel is very shining and remains there. Does anybody know how to deal and fix this problem? This brand new iMac changed my feeling about Apple. Anybody has the similar problem with me? I need your guys' help!!!