diff -r 5a6b6e770365 -r 68c69c656a2c web/lib/Zend/Cache/Backend/Libmemcached.php
--- a/web/lib/Zend/Cache/Backend/Libmemcached.php	Thu May 07 15:10:09 2015 +0200
+++ b/web/lib/Zend/Cache/Backend/Libmemcached.php	Thu May 07 15:16:02 2015 +0200
@@ -15,9 +15,9 @@
  * @category   Zend
  * @package    Zend_Cache
  * @subpackage Zend_Cache_Backend
- * @copyright  Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
+ * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
- * @version    $Id: Libmemcached.php 24593 2012-01-05 20:35:02Z matthew $
+ * @version    $Id$
  */
 
 
@@ -35,7 +35,7 @@
 /**
  * @package    Zend_Cache
  * @subpackage Zend_Cache_Backend
- * @copyright  Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
+ * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  */
 class Zend_Cache_Backend_Libmemcached extends Zend_Cache_Backend implements Zend_Cache_Backend_ExtendedInterface
@@ -132,7 +132,7 @@
                     $this->_log("Unknown memcached client option '{$name}' ({$optConst})");
                 }
             }
-            if ($optId) {
+            if (null !== $optId) {
                 if (!$this->_memcache->setOption($optId, $value)) {
                     $this->_log("Setting memcached client option '{$optId}' failed");
                 }