I have WPMU 3.0.1 with 17 subsites. plugin v.2.0.0.I activate the plugin in mu-plugins directory.
Just on one subsite I have fatal error:
Fatal error: Call to undefined function _wp_get_user_contactmethods() in /....../wp-admin/includes/user.php on line 382
16 subsite with main site work fine. Only one not.
Can you halp me?