--- dropdownsitem.class.php.orig	2013-09-24 02:40:31.000000000 +0200
+++ dropdownsitem.class.php	2013-09-30 11:17:07.000000000 +0200
@@ -6,15 +6,15 @@
 
 class PluginCustomfieldsDropdownsItem extends CommonTreeDropdown  {
 
-   function canView() {
+   static function canView() {
       return true;
    }
 
-   function canCreate() {
+   static function canCreate() {
       return true;
    }
 
-   function getFormURL($full=true) {
+   static function getFormURL($full=true) {
       global $CFG_GLPI;
 
       $dir = ($full ? $CFG_GLPI['root_doc'] : '');