CB

cbacl::get_groups_below_me()

and cb.core.php line 3636 (maybe this could use the acl-function instead of duplicating the code ?)

should not remove anything if a user IS super-admin:

                // remove users 'above' me
                $i                            =    0;
                while ( $i < count( $gtree ) ) {
                    if ( in_array( $gtree[$i]->value, $ex_groups ) ) {
                        array_splice( $gtree, $i, 1 );
                    } else {
                        $i++;
                    }
                }