No, in 4.0.x it is even simpler.
All you need to do is alter the "admin/configuration.php" script and replace this piece of code:
PHP Code:
$trusted_post_variables = array("gpg_key", "pgp_key");
with this:
PHP Code:
$trusted_post_variables = array("gpg_key", "pgp_key", "site_administrator", "users_department", "orders_department", "support_department", "newsletter_email");