Edit History for the buggy Release:
http://musicbrainz.org/release/95603419-986f-4c14-82e7-f67a6a31465d/edits

http://musicbrainz.org/edit/9295812 shows 2 release dates of "23" and "27", this release got split into 2 for a new schema.

Now:

http://musicbrainz.org/edit/25703065 is entered to merge the 2 distinct releases. It passes.
http://musicbrainz.org/edit/25703075 attempts to remove "23", which is incorrect. It failed.

http://musicbrainz.org/release/95603419-986f-4c14-82e7-f67a6a31465d now has "23" instead of "27". Because of http://musicbrainz.org/edit/25703075, I don't think I chose the wrong merge direction. Therefore, I think there's a serious bug where the correct data ("27") is trashed in a release merge.