While adding the tracklist at http://tickets.musicbrainz.org/secure/attachment/10215/tracklist.txt using fmi's instructions from separate issue
1. Use "Add various artists release"
2. Check VA checkbox - use any title
3. Paste track list from the attached file (as is)
4. Click straight to Add missing entities
Among others, it complains to me about the artists Justine, Greed, Alex Party, Winx* - ALL of which have either exact matches in the DB or easily searchable matches. The interface basically forces me to add duplicate artists; not displaying any of the trivial matches.
Alex Party: http://musicbrainz.org/search?query=Alex+Party&type=artist
If you click through to actually enter the edit (with all the add artists) it gives you an ISE; I'm guessing this is probably because it's violating dupe artists constraints with no comment, but test is currently broken so I can't see the full error.