My guess is that they're the ones getting sent back the most because they're the ones getting sold the most. I know a couple of people who have them who have no problems, but I often wonder (I don't really know) how they are at handling different forms of sound files. The things you buy off iTunes aren't really mp3s - they're another file type, but can be easily converted (though I'm not sure that's really legal). anyway, the people I know listen to both iTunes files and mp3s on their iPods, and it works swell.