--- kernel/classes/ezcontentobjecttreenode.php	2011-03-24 10:32:36.897049975 +0100
+++ kernel/classes/ezcontentobjecttreenode.php	2011-03-24 10:32:51.659050395 +0100
@@ -6110,7 +6110,7 @@
                 $className = $class['name'];
             }
             $classList[] = array( 'classID' => (int) $classID,
-                                  'name'    => htmlentities( $className, ENT_QUOTES ) );
+                                  'name'    => htmlentities( $className, ENT_QUOTES, 'UTF-8' ) );
         }
 
         if ( $classList )