Periodically (maybe about every ten minutes) as I listen to music on my iPhone it experiences a 3-4 second period of sound-garbling audio distortion. Not sure what might trigger this, but my first guess might have to do with the phone periodically checking emails during playback. Is this an isolated issue or are there other users experiencing the same situation? It seems to happen in both shuffle and normal play and can happen anytime during playback. I have only had the phone for about a week, its the 16GB Model.