Here's something I've noticed before but didn't pay much attention to. But it happened again at lunchtime and that got me to do some testing. There are times when my 4th Gen iPod, plugged into my Prius V's USB slot, plays back too slowly. My first assumption was that it was the result of being left in the car, which was fairly hot inside. So I unplugged it from the USB port and used an iPod AUX cord plugged into the AUX jack. Playback speed was spot-on. Plugged it back into the USB port with a USB cable, and once again it was slow. Anyone else noticed that?
