Noticed this in the past few days when playing music through last.fm for a long period of time AND charging my phone at the same time. Using the last.fm app OR widget, playing though the headphone jack to an aux port, and plugged into a cigarette lighter (haven't tried USB or the wall charger), the battery gets hot. Up to 40 degrees celcius according to Spare Parts (normal is below 30), and the playback starts to skip, moreso when the screen is in lock mode. Once I turn off last.fm, the temp drops. Anyone else having this problem? Any known fixes? I don't use my phone very often for long periods of time like this, but I might have to take a trip to a Verizon store after the holidays if it can't be fixed. Thanks!