pg_dump and REVOKE on function

Below is output from 7.3 pg_dump that is being loaded into 7.4 beta1.

It would seem that revoking the permissions of the owner doesn't work
out so well.

r=# CREATE FUNCTION weekdate (date) RETURNS timestamp with time zone
r-# AS '
r'# SELECT cast(to_date(''01 01 ''|| extract(''year'' FROM $1), ''DD MM
YYYY'') +
r'# (cast(extract(''week'' FROM $1) AS numeric) *7-8) * interval ''1
day'' as timestamp with time zone);'
r-# LANGUAGE sql;
CREATE FUNCTION
r=#
r=#
r=# --
r=# -- TOC entry 752 (OID 18968885)
r=# -- Name: weekdate (date); Type: ACL; Schema: public; Owner: rbt
r=# --
r=#
r=# REVOKE ALL ON FUNCTION weekdate (date) FROM PUBLIC;
REVOKE
r=# GRANT ALL ON FUNCTION weekdate (date) TO PUBLIC;
GRANT
r=# REVOKE ALL ON FUNCTION weekdate (date) FROM rbt;
ERROR: dependent privileges exist
HINT: Use CASCADE to revoke them too.