Artist "Transmission0" [1] has a release group titled "0" [2]. A day or two ago the webservice started to return an empty value [3] for this release group instead of the real title, while the website still shows the correct title. I guess this commit [4] is responsible.

[1]: http://musicbrainz.org/artist/2a6f9aed-dc6f-4bfb-a9a4-be7078f71ed0
[2]: http://www.myspace.com/5013254
[3]: http://www.musicbrainz.org/ws/2/release-group?artist=2a6f9aed-dc6f-4bfb-a9a4-be7078f71ed0
[4]: http://git.musicbrainz.org/gitweb/?p=musicbrainz-server.git;a=commitdiff;h=d37f496ca442537611d47ba7c03051b570aec034