from http://codereview.musicbrainz.org/r/1110/ :

It also broke when I did the following:

1. http://test.musicbrainz.org/release/092ee7c8-3625-41ba-aa00-5ca34085e6ab/edit
2. Tracklist tab
3. Add disc -> existing tracklist -> added the 'No Resistance' by 'Retractor' tracklist
4. Add disc -> freedb -> "When De Riddim Explode" by "Brother Resistance" on page 3 (which comes up if I just search for "Resistance" without an artist, which seems a bit odd, but minor).
5. Next
6. Observe "a tracklist is required" for disc 3
7. Also observe the error message is "Warning: There were one or more errors, please check the following fields: 2"