When adding a a release, the RE won't update track artists properly.

Steps to duplicate:

• Go to http://musicbrainz.org/release/add?artist=3d4198c9-dc74-4eeb-ab90-68cc2d45b287
• Type in a release name (e.g. "test").
• Go to the tracklist tab and enter a track or two.
• Go back to the release information tab, and change the artist credit: "James Dooley, Credited as Jim Dooley"
• Go back to the tracklist tab.
  Note that the "Credited as" information hasn't changed on the tracks.