What I expect: the soundtrack '27 Dresses' has an AR linking it to IMDb; this was added pre-NGS (see edit [1]). I expect that post-NGS that the same relationship is now added to the release-group.

What I see instead. On the release-group [2], this relationship is now the 'uses samples from the movie at imdb'.

I've brought this up on the mailing list, but I realised it might be a bug instead of a migration gone wrong. I summarized this on the wiki [3].

[1] http://classic.musicbrainz.org/show/edit/?editid=14287302
[2] http://musicbrainz.org/release-group/2fd46c28-3543-3a78-a2a3-b34f17ae5aaf/relationships
[3] http://wiki.musicbrainz.org/User:Azertus/Potential_IMDb_Relationship_Type_Problem