I don't know. It was one of the hottest summers on record in the UK this year. But it's no Arizona! Got to keep equipment away from central heating though.
The only problems I've heard of are one or two disc drive faults (not loading/taking discs), one or two dead ones (red light and beeps but no start up) and a few niggling issues like a weak wireless signal and HDMI. But I think most gripes are users not getting their heads around the technology (got to
the US PS3 forum to see what I mean). From what I've read the PS3 looks a more complicated piece of hardware than the 360. I don't know if that's a good thing or not but it certainly means more options and stuff to tweak and play around with!