Apparently I'm not the only one with this problem, but I haven't yet found a solution. This is really pissing me off, and it's one of the things that really makes me regret switching. I am very careful with tagging my music collection. VERY careful. I've gone over my whole collection with a fine-tooth comb and tagged everything properly, but when I put it on my Galaxy S3 (external SD card) some of the tags get messed up. For example, I have a Pendulum album, which is tagged as "Drum & Bass" genre. But when I look on my phone, there is no "Drum & Bass" category. I instead find the album under "Electronic", along with a whole bunch of other albums that are certainly NOT tagged as "Electronic." Then I have this mysterious "ta" genre, which seems to contain only one album. Not sure if this is related, but these files happen to me .m4a files. I have yet another genre, "<unknown>" which presumably means the genre tag isn't specified, which I know is not the case, because ALL of my songs are properly tagged. I found only one song in here, from an album, the rest of which appears incorrectly in he "Electronic" genre. Just to be certain the tags aren't corrupted, I copied the offending files from my card back onto my computer and checked the tags-- they are just fine. This is *EXTREMELY* upsetting. How can something as simple as ID3 tags have been eff'd up so badly on what is supposed to be a top-tier phone?