pgadmin III bug - schema prefix missing in return type

When I declare a function with a schema-qualified return type, PgAdmin does 
not show the schema in the return type:

Here's what I tell Postgres:
===============================================

CREATE OR REPLACE FUNCTION xxx.packet_data(pg_catalog.numeric, pg_catalog.text)  RETURNS setof xxx.data_tbl AS
'        select * from axxx.data_view        where packet_rec_id = $1        and   tag           = $2;
'  LANGUAGE 'sql' VOLATILE;

=====================================================
Here is what PgAdmin shows (note the change following the RETURNS)
=====================================================
CREATE OR REPLACE FUNCTION xxx.packet_data(pg_catalog.numeric, pg_catalog.text)  RETURNS setof data_tbl AS
'        select * from axxx.data_view        where packet_rec_id = $1        and   tag           = $2;
'  LANGUAGE 'sql' VOLATILE;



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Michael