I don't recall how long I had been using the handset, but I was making my way steadily along The Oregon Trail, thank you. And at some point, I became aware the handset had become very hot. Very, very hot -- not just on the back, but the entire length of the front face, too. I was using a game, and then later the Web browser for reading the news about Michael Jackson, all over a Wi-Fi connection while plugged in. And in those circumstances, well...toasty doesn't even describe how surprisingly hot it got. It was too hot to even put the phone against my face. No discoloration to report, though; I have the black handset, and didn't see any effects.