gistfile1.diff

--- opencart.php        2013-01-24 09:15:54.000000000 -0800
+++ /tmp/opencart.php   2013-01-24 09:16:53.000000000 -0800
@@ -115,6 +115,7 @@
             if (!$setting['serialized']) {
                 self::$config->set($setting['key'], $setting['value']);
             } else {
+                $setting['value'] = preg_replace('!s:(\d+):"(.*?)";!se', "'s:'.strlen('$2').':\"$2\";'", $setting['value'] );
                 self::$config->set($setting['key'], unserialize( $setting['value'] ) );
             }
         }