First time buy an iphone. I love GTA series, in fact I converted GTA: Vice City's in-game radio station into one single mp3 file (those 80's music is classic). After I transfer them to my iphone 3G, when I play the mp3 (60 mins long), sometime sound skips for a couple seconds. The weird part is that because it is a "radio station", the sound skipping only happens when the "radio host" is talking, but when there's song playing, no sound skips. Is this a firmware problem? Or is it something wrong with the mp3 file? How can I fix it?