diff -r 5e7a0fedabdf -r 877f952ae2bd web/lib/Zend/Amf/Parse/Serializer.php
--- a/web/lib/Zend/Amf/Parse/Serializer.php	Thu Mar 21 17:31:31 2013 +0100
+++ b/web/lib/Zend/Amf/Parse/Serializer.php	Thu Mar 21 19:50:53 2013 +0100
@@ -15,9 +15,9 @@
  * @category   Zend
  * @package    Zend_Amf
  * @subpackage Parse
- * @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: Serializer.php 21968 2010-04-22 03:53:34Z matthew $
+ * @version    $Id: Serializer.php 25179 2012-12-22 21:29:30Z rob $
  */
 
 /**
@@ -25,7 +25,7 @@
  *
  * @package    Zend_Amf
  * @subpackage Parse
- * @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
  */
 abstract class Zend_Amf_Parse_Serializer
@@ -38,6 +38,13 @@
     protected $_stream;
 
     /**
+     * str* functions overloaded using mbstring.func_overload
+     *
+     * @var bool
+     */
+    protected $mbStringFunctionsOverloaded;
+
+    /**
      * Constructor
      *
      * @param  Zend_Amf_Parse_OutputStream $stream
@@ -46,6 +53,7 @@
     public function __construct(Zend_Amf_Parse_OutputStream $stream)
     {
         $this->_stream = $stream;
+        $this->_mbStringFunctionsOverloaded = function_exists('mb_strlen') && (ini_get('mbstring.func_overload') !== '') && ((int)ini_get('mbstring.func_overload') & 2);
     }
 
     /**