I am noticing an odd issue under iOS 7 Beta 3 (and 2 I think). I've purchased music from the iTunes Store and downloaded it on the device. I connect the iPhone 5 to iTunes and click "On this iPhone". I see the purchased music just fine. Later, while disconnected from iTunes. I delete this music from the iPhone. The next time I connect to iTunes, the music is still listed under "On this iPhone" but it is greyed out and with an empty broken circle to the left of each track. I've tried re-downloading the music onto the iPhone and then deleting it from iTunes instead. It appears to be gone but the next time I click sync, the greyed out tracks re-appear. It does NOT do this for music I've ripped from CD myself. It's like any purchased music that was ever on the device leaves behind a footprint. It doesn't seem to effect anything but it's annoying.