I am quite positive i didn't have this problem when using SonicStage. Therefore: One thing about MP3FM that is extremely annoying, is that if you same "Artist" ID-tag, but different "Genre" ID-tags on your mp3 files, they will be listed as "different artists" on your player after transferring them (with MP3FM). As an example, imagine you have the following files: Artist | Title | Genre ------------------------------------------------------------ ACDC | Highway to Hell | Rock ACDC | Back in Black | Hard Rock ------------------------------------------------------------ After you transfer them with MP3FM, they will be listed on your player (if searching by artist) NOT as: Artist: ACDC Title: Highway to Hell Back in Black But rather: Artist: ACDC Title: Highway to Hell Artist: ACDC Title: Back in Black I am not sure this is the case with all walkman devices, but it certainly is with my HD5! Easiest solution is perhaps to simply remove all the Genre fields in your ID-tags Anyone know of a workaround for this? Reverse engineering MP3FM gogo?