Copied from http://chatlogs.musicbrainz.org/musicbrainz/2013/2013-03/2013-03-19.html#T09-49-45-806129:
...
[19.03.2013 11:53:42] <ianmcorvidae> what's happening is it has 'Artists', "Release Groups" etc. as strings and then it has a thing to lowercase them
[19.03.2013 11:53:49] <ianmcorvidae> which is almost certainly wrong :/
...
[19.03.2013 11:58:48] <Leftmost> To get it right will probably mean separate strings for each entity.