I've noticed in my iPod (60g) that certain tracks (especially more modern, bass heavy) have a slight distortion. This distortion becomes more pronounced if I use a bass/treble heavy EQ setting like "RnB". I am using the "Sound Check" feature ("on" in both iTunes and iPod) to even out volumes (although some tracks are still oddly quieter). I know the distortion is not in the tracks because it's only in the headphone output, regardless of headphones used or device using the out for a feed, regardless of volume setting. The really odd thing is these same tracks are totally clean when played through any device using the iPod's dock connection, regardless of EQ setting (iPod's volume setting is non-effective through the dock connector). Is it possible the signal is being fed too hot into the iPod's headphone amplifier? Has anyone else noticed/experienced this?