I found bug in tsearch2 module (8.3, 8.4).
Thank you, fixed http://archives.postgresql.org/message-id/20090128183133.0d6f9755...@cvs.postgresql.org (for 8.3 too)
-- Teodor Sigaev E-mail: teo...@sigaev.ru WWW: http://www.sigaev.ru/ -- Sent via pgsql-bugs mailing list (pgsql-bugs@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-bugs