This problem is on- going for me with FW 3.7 (Music stops playing). I think Orangeblood has good point re: cause. I have 3 songs which only show up on the watch, but not on Garmin express, and the music stops whenever it runs into these 3 songs. All 3 with a . (=period symbol) in the artist name. Garmin express let me load the songs, and delete them, but they did not delete off of the watch. GarminJoey -Is this a known bug? Already had to hard re-boot and lose all data twice due to Blue triangle of death problems - Really bummed to do it again after more than 1 month....