I've been getting really frustrated with my Vibrant. I have been downloading music from the Amazon MP3 store, and have also loaded some of my own tunes onto the phone. When I try to play anything, it gets jacked up. Using the stock music player, the message I get is "this type of audio file is not supported". When I try to play the same track using doubletwist, the message I get is "sorry, the file you are trying to play does not exist anymore". WTH? and of course Amazon wants to charge me for the tunes again. Anybody got any ideas?:'(