INSERT in 7.0

What is changed on INSERT/max() in v7.0? (CVS - today).

See:

--- new version:

template1=> select * from pg_group;groname | grosysid | grolist
---------+----------+---------_dummy_ |        0 | {}
(1 row)

template1=> INSERT INTO pg_group VALUES ('abg_root', max(grosysid)+1, '{}');
ERROR:  attribute 'grosysid' not found


--- old version (6.5):

template1=> select * from pg_group;
groname|grosysid|grolist
-------+--------+-------
_dummy_|       0|{}
(1 row)

template1=> INSERT INTO pg_group VALUES ('abg_root', max(grosysid)+1, '{}');
INSERT 10173952 1

                        Karel