Hmm... it looks like sometimes when you download one of these mp3s, it cuts short - ie, it only grabs the first 2/3 of the track. The full-length files are on the servers: anyone know why peoples' browsers (including mine) might not be cooperating? (Techies: we need your help!)
update: the tracks seem to load fine if you play them in-browser (rather than saving the link), but this is no solution...