Ticket #23418: 23418.diff

wp-admin/network/settings.php

@@ -62 +62 @@
                 if ( ! isset($_POST[$option_name]) )
                         continue;
                 $value = stripslashes_deep( $_POST[$option_name] );
+                if( 'illegal_names' == $option_name )
+                        $value = explode( ' ', $value );
                 update_site_option( $option_name, $value );
         }