from http://bugs.musicbrainz.org/ticket/5213 which mentioned in the comments that the suggestion is only for release groups with only one release in them.

I already saw this happening twice singe release groups have been implemented (two days ago):

• someone adds a new release with title "XXX"
• a new release group is created with name "XXX"
• the release get renamed to "Foo Bar"
• the release group title is still "XXX", not "Foo Bar"!

As it is difficult to automatically correct the release group title when the release title is changed (also taking into account groups with multiple discs), couldn't there a be a report that shows release groups containing releases with very different titles?