Still trying to fix http://musicbrainz.org/release/a2b21df9-0841-3095-b1dc-47ee20807cb2/edit See also MBS-2179

1. Add empty disc
2. Remove both the empty disc and the first disc
3. Add the new disc by reusing an existing tracklist (http://musicbrainz.org/tracklist/1083169)
4. Go to submit the edit. Notice some oddity about "Mediums: Disc 1: (moved from position 3)" (See screenshot)
5. Internal Server Error