Ticket #12349: 12439.diff

wp-includes/taxonomy.php

@@ -1586 +1586 @@
         $name = stripslashes($name);
         $description = stripslashes($description);
 
+        $slug_from_name = sanitize_title($name);
+
         if ( empty($slug) )
-                $slug = sanitize_title($name);
-        elseif ( is_term($slug) )
+                $slug = $slug_from_name;
+        elseif ( is_term($slug) && ( $slug != $slug_from_name ) )
                 return new WP_Error('term_slug_exists', __('A term with the slug provided already exists.'));
 
         $term_group = 0;