root@zabbix:/usr/share/zabbix # diff -Naur include/classes/class.cldap.php.orig include/classes/class.cldap.php
--- include/classes/class.cldap.php.orig	2014-03-18 16:08:49.710346146 +0100
+++ include/classes/class.cldap.php	2014-04-08 12:23:00.904298965 +0200
@@ -40,7 +40,7 @@
 			),
 			'referrals' => 0,
 			'version' => 3,
-			'starttls' => null,
+			'starttls' => true,
 			'deref' => null
 		);