The following bug has been logged on the website:
Bug reference: 6654
Logged by: wbrana
Email address: wbrana(at)gmail(dot)com
PostgreSQL version: 9.1.3
Operating system: Linux
Description:
CREATE INDEX idx_post_text ON posts USING gin
(to_tsvector('english'::regconfig, post_text::text))
select * from v_search WHERE to_tsvector('english', post_text) @@ 'europe'
returns no rows, but
select * from v_search WHERE to_tsvector('english', post_text) @@ 'japan'
returns row with "Japan and Europe"