e.g. http://test.musicbrainz.org/recording/64a8d59c-95cd-48b3-8da7-64517f850d85 (valid as of 17/09/2011, will disappear if database is refreshed)

There is both a "performance" and "cover performance" AR to the work from this recording - duplicate from NGS-migration. While this is not normal, it should show "related works" sections only for each unique work.