I've used MP3TAG to update about 17000 songs but just realized that the genre does not appear for any of my m4a files. I can see them in MP3TAG, but the category is empty (or something different) in xbmc, media monkey and itunes. Is there an easy fix to this?
If these programs have a database of their own you would have to use the function to update the database.
For iTunes you could use the "Information" function on a single track to force the update and see if the genre is actually there.
For updating the iTunes db there are a couple of scripts around - or you delete all the tracks from iTunes and reread them.
I do not know how to update the database (if there is one) for the other programs.
Unfortunately, I've tried that. I've clicked on 'Get Info' for a few songs in iTunes to no avail and have updated the library for other programs. (I know this has been done since other files like flac have been updated.)
I have same problem for mp4 files, and not just with 'genre' but with 'album' also. These fields show a value within mp3tag, but Vista explorer shows the fields as blank, and my phone's Winamp app thinks they are blank too. An easy fix would be awesome.