My iPhone (3GS) has developed a new and annoying anomoly. On its own its starts playing music from the iTunes songs that I've synched to it, often when the iPhone is in my pocket. Ordinarily I don't even know this is happening unless I hear faint music coming from the earphones and then sometimes I find that the battery is worn way down because it has been playing for some time. There is no particular logic to the particular music it starts up. I am not doing anything consciously to start the music. I haven't clicked on the Music app or selected a piece or playlist. It just happens. I tried restoring factory settings and resynched from backup but that did not fix the problem. This started occurring within the past week or so. It has not happened before that in the several years I've owned this phone. Anyone having this issue? Is there a fix? Thanks.