9.0RC1 error variable not found in subplan target lists

In 9.0 RC1 query below causes error

Variable not found in subplan target lists

In earlier version this query works OK.

How to fix ?

Andrus.

SELECT *
FROM (select 1) xtoode
LEFT JOIN (SELECT hmguid.toode,
COALESCE(hinnamtr.hinnak,klient.hinnak ) AS hinnak
FROM (
SELECT
hmhinnak.toode,
''::char as guid
FROM (

select ''::char as toode,
1 as prioriteet
) prioriteet

JOIN (

SELECT
''::char as toode,
''::text as guid,
1 as prioriteet
) hmhinnak

USING (toode,prioriteet)

) hmguid

JOIN (select ''::char as guid, ''::char as hinnak) hinnamtr USING (guid)
LEFT JOIN klient ON klient.kood=''
) temphinnaks on true;