About djmixer ? 

In   http://www.jthink.net/jaudiotagger/tagmapping.html MUSICBRAINZ_ALBUMSTATUS yes, but in  https://docs.google.com/spreadsheet/ccc?key=0AoYQhIuWC-gcdHZwUDM3RGhneGMxSXpEX3pONXd6MWc#gid=0  it is blank.. looks weird to have MUSICBRAINZ_ALBUMSTATUS for djmixer anyway, seems an error to me.