I had my iPhone's screen replaced at the Genius Bar on July 12, 2009 due to stuck pixels. I just noticed that my bottom row (4th row from top, not home row) of apps will not launch and that the area seems unresponsive. However, when I use the keyboard, every button works, it just seems to affect the main screen and scrolling in apps. I wouldn't usually be worried about this, but my warranty expired in August. Does the replacement of the screen by the genius bar extend my warranty at all? I have tried restarting, restoring, and restoring in DFU mode. I am currently running 3.1 on a 3G. Please let me know if you have any advice.