I have looked at several forum posts on several sites to find a solution to my problem, but have failed. I have a G1 that does not seem to like mp4s. The various forums all recommended this file type (some recommended ipod presets, others iphone) but I've successfully converted files to mp4 using a few different converters that will still not play on my G1. Is there some problem with my specific phone? Any light you can shed on this would be greatly appreciated.