Has anyone else found that when you get the volume up just even a bit on some tracks, the iPhone's speaker distorts badly when listening to a lot of music? Or is it just mine? EDIT: Certain ringtones (Marimba, Strum and others) distort slightly when the volume is high, as well as the "tri-tone" message sound. These never distorted on my old iPhone (US one back in August). Is it just that the volume has been increased now?