To repeat: There is playback data logged into the database that should make diagnosis possible.
So please send in your database, even if you've rebuilt the index. The playback log is still present, and I can probably reproduce the error, subject to some other caveats that come into play.
In the future, if you encounter a crash with the name index, please submit your database right away, before rebuilding it, for the maximum probability of my success in diagnosing and fixing the error.
Thanks!