HEREs an update... ITS NOT JUST THE TOP OF THE SCREEN... If you are experiencing this problem... Open up Spare Parts... And put it in landscape... now you will see the problem still applies to the notification bar... I assure it is not the notification bar tho... The edges of the whole screen, in any orientation... I have a video in another thread showing the problem ... lemme find it... though i did not doing sideways, if you do it you will see it too...
this only applies to those who actually have the ground problem
http://forum.ppcgeeks.com/showthread.php?t=125062