diff -r 5e7a0fedabdf -r 877f952ae2bd web/lib/Zend/Controller/Action/Helper/AjaxContext.php
--- a/web/lib/Zend/Controller/Action/Helper/AjaxContext.php	Thu Mar 21 17:31:31 2013 +0100
+++ b/web/lib/Zend/Controller/Action/Helper/AjaxContext.php	Thu Mar 21 19:50:53 2013 +0100
@@ -15,9 +15,9 @@
  * @category   Zend
  * @package    Zend_Controller
  * @subpackage Zend_Controller_Action_Helper
- * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
+ * @copyright  Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
- * @version    $Id: AjaxContext.php 20096 2010-01-06 02:05:09Z bkarwin $
+ * @version    $Id: AjaxContext.php 24593 2012-01-05 20:35:02Z matthew $
  */
 
 /**
@@ -32,7 +32,7 @@
  * @category   Zend
  * @package    Zend_Controller
  * @subpackage Zend_Controller_Action_Helper
- * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
+ * @copyright  Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  */
 class Zend_Controller_Action_Helper_AjaxContext extends Zend_Controller_Action_Helper_ContextSwitch
@@ -68,7 +68,10 @@
     {
         $this->_currentContext = null;
 
-        if (!$this->getRequest()->isXmlHttpRequest()) {
+        $request = $this->getRequest();
+        if (!method_exists($request, 'isXmlHttpRequest') ||
+            !$this->getRequest()->isXmlHttpRequest())
+        {
             return;
         }