Release http://musicbrainz.org/release/2b9e2a11-ab57-43d6-a104-74dd107ac53f data doesn't correspond to the data actually added (seen in edit history: http://musicbrainz.org/release/2b9e2a11-ab57-43d6-a104-74dd107ac53f/edits). It at least seems that the tracklist of the release has been replaced by a tracklist from a release in the same release group http://musicbrainz.org/release/3f8c96f8-bf02-47d9-a009-24d0ab0da442.