In iTunes, the thermometer at the bottom of the Device Summary screen shows the types of data (Audio, Video, Photos, etc.) in different colors on a thermometer display. All of a sudden I have big fat 3Gb or "Other" (yellow) segment there. The last time I looked you could hardly see the little yellow strip on the right (it was really small). I've racked my brain ... what did I do? Is there any way to figure out what that stuff is?