I had this same problem as above. One dead line about a half an inch from the top of the screen. My phone is still under the one year manufacturer's warranty, so I sent it out for repair through my carrier, which is free to do. It came back perfect, then about a month after, started again. I've had random issues with the digitizer on this phone since I got it, and even exchanged the first one I got within the return period because i had major issues in the first 4 days. When I noticed the same problems with the new phone I figured maybe it was a software issue. I've done a software update since, and it fixed some of the other issues, but clearly this is a hardware issue that affected a mass amount of these models. I was hoping to update to the G4 eventually when it comes out, but this has me skeptical!