diff -r 5e7a0fedabdf -r 877f952ae2bd web/lib/Zend/Feed/Pubsubhubbub/Subscriber/Callback.php
--- a/web/lib/Zend/Feed/Pubsubhubbub/Subscriber/Callback.php	Thu Mar 21 17:31:31 2013 +0100
+++ b/web/lib/Zend/Feed/Pubsubhubbub/Subscriber/Callback.php	Thu Mar 21 19:50:53 2013 +0100
@@ -14,9 +14,9 @@
  *
  * @category   Zend
  * @package    Zend_Feed_Pubsubhubbub
- * @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: Callback.php 23069 2010-10-10 10:57:42Z padraic $
+ * @version    $Id: Callback.php 24593 2012-01-05 20:35:02Z matthew $
  */
 
 /**
@@ -37,7 +37,7 @@
 /**
  * @category   Zend
  * @package    Zend_Feed_Pubsubhubbub
- * @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_Feed_Pubsubhubbub_Subscriber_Callback
@@ -49,7 +49,7 @@
      * @var string
      */
     protected $_feedUpdate = null;
-    
+
     /**
      * Holds a manually set subscription key (i.e. identifies a unique
      * subscription) which is typical when it is not passed in the query string
@@ -59,14 +59,14 @@
      * @var string
      */
     protected $_subscriptionKey = null;
-    
+
     /**
      * After verification, this is set to the verified subscription's data.
      *
      * @var array
      */
     protected $_currentSubscriptionData = null;
-    
+
     /**
      * Set a subscription key to use for the current callback request manually.
      * Required if usePathParameter is enabled for the Subscriber.
@@ -155,9 +155,9 @@
             return false;
         }
         $required = array(
-            'hub_mode', 
+            'hub_mode',
             'hub_topic',
-            'hub_challenge', 
+            'hub_challenge',
             'hub_verify_token',
         );
         foreach ($required as $key) {