Last week’s search server release had some bugs that we decided should be fixed sooner than later. Paul Taylor rose to the challenge and fixed 4 important bugs and we just finished releasing the updated code. Thanks for your efforts, Paul!
Release Notes – MusicBrainz Search Server – Version 2013-04-04
Bug
- [SEARCH-279] – Seach server returning wrong results
- [SEARCH-280] – Artist search DAVID BOWIE → FRANZ SCHUBERT (score 100) !? Bowie (score 0)
- [SEARCH-281] – If set explain=true option with dismax search it actually does a non-indexed search
Improvement
- [SEARCH-267] – Create new rewrite method for Dismax FuzzySearch
MetaBrainz Blog 
cool, Y( ^o^)YAY !
Great! this seems to have fixed Santana as well. Nice work!
You might want to look at “Bob Marley” as well. He only gets 96% match with some random comedian always coming top with 100%
http://musicbrainz.org/search?query=bob+marley&type=artist&method=indexed