Error working with Temporary Sequences in plpgsql in 8.1 (8.0 works fine)

Hi,

here is a testcase:

CREATE OR REPLACE FUNCTION testseq()
RETURNS void AS
$BODY$
BEGIN
CREATE TEMP SEQUENCE test;
PERFORM testseq1();
DROP SEQUENCE test;
RETURN;
END; $BODY$
LANGUAGE 'plpgsql' VOLATILE;
ALTER FUNCTION testseq() OWNER TO postgres;

CREATE OR REPLACE FUNCTION testseq1()
RETURNS void AS
$BODY$
DECLARE I INTEGER;
BEGIN
I:= nextval('test');
RETURN;
END; $BODY$
LANGUAGE 'plpgsql' VOLATILE;
ALTER FUNCTION testseq1() OWNER TO postgres;

SELECT testseq();

-- this works fine.

SELECT testseq();

ERROR: could not open relation with OID 21152
CONTEXT: PL/pgSQL function "testseq1" line 3 at assignment
SQL statement "SELECT testseq1()"
PL/pgSQL function "testseq" line 3 at perform

Greetings,

Daniel.