How to use RETURN TABLE in Postgres 8.4

I'written something like this:

CREATE TABLE "bug_table" (
  "id" BIGINT NOT NULL,
  test VARCHAR,
  CONSTRAINT "test_table_pkey" PRIMARY KEY("id")
) WITHOUT OIDS;

INSERT  INTO bug_table (id,test) VALUES (1,'test');
select * from bug_table;

CREATE OR REPLACE FUNCTION buggy_procedure() RETURNS TABLE (id INT8,
test VARCHAR)
    AS $$
BEGIN
    -- @todo hide password
    RETURN QUERY
        SELECT id  ,test
        FROM bug_table
    ;
END;
$$
    LANGUAGE plpgsql STRICT SECURITY DEFINER;
SELECT * FROM buggy_procedure();

---------------------------
it returns 1 but empty row. What is wrong with this?

Regards
Michal Szymanski
http://blog.szymanskich.net