diff -r 5e7a0fedabdf -r 877f952ae2bd web/lib/Zend/Json/Decoder.php
--- a/web/lib/Zend/Json/Decoder.php	Thu Mar 21 17:31:31 2013 +0100
+++ b/web/lib/Zend/Json/Decoder.php	Thu Mar 21 19:50:53 2013 +0100
@@ -14,9 +14,9 @@
  *
  * @category   Zend
  * @package    Zend_Json
- * @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: Decoder.php 22653 2010-07-22 18:41:39Z mabe $
+ * @version    $Id: Decoder.php 24799 2012-05-12 19:27:07Z adamlundrigan $
  */
 
 /**
@@ -29,7 +29,7 @@
  *
  * @category   Zend
  * @package    Zend_Json
- * @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_Json_Decoder
@@ -236,6 +236,9 @@
                 // Create new StdClass and populate with $members
                 $result = new StdClass();
                 foreach ($members as $key => $value) {
+                    if ($key === '') {
+                        $key = '_empty_';
+                    }
                     $result->$key = $value;
                 }
                 break;