diff -r 5a6b6e770365 -r 68c69c656a2c web/lib/Zend/Validate/Abstract.php
--- a/web/lib/Zend/Validate/Abstract.php	Thu May 07 15:10:09 2015 +0200
+++ b/web/lib/Zend/Validate/Abstract.php	Thu May 07 15:16:02 2015 +0200
@@ -14,9 +14,9 @@
  *
  * @category   Zend
  * @package    Zend_Validate
- * @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: Abstract.php 25105 2012-11-07 20:33:22Z rob $
+ * @version    $Id$
  */
 
 /**
@@ -27,7 +27,7 @@
 /**
  * @category   Zend
  * @package    Zend_Validate
- * @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
  */
 abstract class Zend_Validate_Abstract implements Zend_Validate_Interface
@@ -229,6 +229,8 @@
             } else {
                 $value = $value->__toString();
             }
+        } elseif (is_array($value)) {
+            $value = $this->_implodeRecursive($value);
         } else {
             $value = implode((array) $value);
         }
@@ -255,6 +257,26 @@
     }
 
     /**
+     * Joins elements of a multidimensional array
+     *
+     * @param array $pieces
+     * @return string
+     */
+    protected function _implodeRecursive(array $pieces)
+    {
+        $values = array();
+        foreach ($pieces as $item) {
+            if (is_array($item)) {
+                $values[] = $this->_implodeRecursive($item);
+            } else {
+                $values[] = $item;
+            }
+        }
+
+        return implode(', ', $values);
+    }
+
+    /**
      * @param  string $messageKey
      * @param  string $value      OPTIONAL
      * @return void
@@ -323,6 +345,7 @@
      * Set translation object
      *
      * @param  Zend_Translate|Zend_Translate_Adapter|null $translator
+     * @throws Zend_Validate_Exception
      * @return Zend_Validate_Abstract
      */
     public function setTranslator($translator = null)
@@ -370,7 +393,7 @@
      * Set default translation object for all validate objects
      *
      * @param  Zend_Translate|Zend_Translate_Adapter|null $translator
-     * @return void
+     * @throws Zend_Validate_Exception
      */
     public static function setDefaultTranslator($translator = null)
     {