Description:
------------
So this was an accident in typing that produced an informative but unexpected result.

Test script:
---------------
    $db = new PDO("mysql:host=localhost;dbname=classicmodels;port=3306;charset=utf8",$user, $password);
    $db->setAttribute(PDO::ATTR_PERSISTENT, TRUE);
    $db->setAttribute(PDO::MYSQL_ATTR_USE_BUFFERED_QUERY, TRUE);
    $db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    $db->setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE, PDO::FETCH_ASSOC);
    $db->setAttribute(PDO::ATTR_EMULATE_PREPARES, FALSE);
    $db->setAttribute(PDO :: ATTR_CASE, PDO :: CASE_NATURAL);
}

echo $db->getAttribute(PDO::PARAM_BOOL).'<br>';

Actual result:
--------------
mysqlnd 5.0.11-dev - 20120503 - $Id: 3c688b6bbc30d36af3ac34fdd4b7b5b787fe5555 $