I'm fairly sure it's not the tags that are causing this, but for the avoidance of doubt, I'm using MP3tag 2.41 to auto tag my FLAC files and MuvUnderCover to find an auto add the cover jpg. I'm ripping using BonkEnc.
The problem... I want to use the composer field that is listed as a valid field, but Twonky reports that this is unknown after population. All other fields (artist, album, title, genre, year) are ok.
Any suggestions?

Also, is there a work around or future enhancement to allow more standard ID3 tags to be used?
