here's one of them:
http://www.mediafire.com/?d75sddl9alxsca8
for me, its ONLY m4a/mp4 files that have this issue; i have about 6 with the issue. most have the genre value i set. i have 42 in all, out of 60k+ others, but these were all downloads. still, i have at least 5k of downloads of other file types, none of which do this.
i think multiple frames, with each app picking the other, is the most likely explanation at this point...