diff -r 5e7a0fedabdf -r 877f952ae2bd web/lib/Zend/Log/Writer/Db.php
--- a/web/lib/Zend/Log/Writer/Db.php	Thu Mar 21 17:31:31 2013 +0100
+++ b/web/lib/Zend/Log/Writer/Db.php	Thu Mar 21 19:50:53 2013 +0100
@@ -15,9 +15,9 @@
  * @category   Zend
  * @package    Zend_Log
  * @subpackage Writer
- * @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: Db.php 22513 2010-07-01 13:48:39Z ramon $
+ * @version    $Id: Db.php 25247 2013-02-01 17:49:40Z frosch $
  */
 
 /** Zend_Log_Writer_Abstract */
@@ -27,30 +27,32 @@
  * @category   Zend
  * @package    Zend_Log
  * @subpackage Writer
- * @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: Db.php 22513 2010-07-01 13:48:39Z ramon $
+ * @version    $Id: Db.php 25247 2013-02-01 17:49:40Z frosch $
  */
 class Zend_Log_Writer_Db extends Zend_Log_Writer_Abstract
 {
     /**
      * Database adapter instance
+     *
      * @var Zend_Db_Adapter
      */
-    private $_db;
+    protected $_db;
 
     /**
      * Name of the log table in the database
+     *
      * @var string
      */
-    private $_table;
+    protected $_table;
 
     /**
      * Relates database columns names to log data field keys.
      *
      * @var null|array
      */
-    private $_columnMap;
+    protected $_columnMap;
 
     /**
      * Class constructor
@@ -58,6 +60,7 @@
      * @param Zend_Db_Adapter $db   Database adapter instance
      * @param string $table         Log table in database
      * @param array $columnMap
+     * @return void
      */
     public function __construct($db, $table, $columnMap = null)
     {
@@ -71,7 +74,6 @@
      *
      * @param  array|Zend_Config $config
      * @return Zend_Log_Writer_Db
-     * @throws Zend_Log_Exception
      */
     static public function factory($config)
     {
@@ -95,6 +97,9 @@
 
     /**
      * Formatting is not possible on this writer
+     *
+     * @return void
+     * @throws Zend_Log_Exception
      */
     public function setFormatter(Zend_Log_Formatter_Interface $formatter)
     {
@@ -117,6 +122,7 @@
      *
      * @param  array  $event  event data
      * @return void
+     * @throws Zend_Log_Exception
      */
     protected function _write($event)
     {
@@ -130,7 +136,9 @@
         } else {
             $dataToInsert = array();
             foreach ($this->_columnMap as $columnName => $fieldKey) {
-                $dataToInsert[$columnName] = $event[$fieldKey];
+                if (isset($event[$fieldKey])) {
+                    $dataToInsert[$columnName] = $event[$fieldKey];
+                }
             }
         }