Description:
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PDO mysql driver configured as in example returns false for DATETIME column. VARCHARS, INT and other columns are returned properly (as php null value).

Test script:
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   	$db = new PDO($dsn, $db_user, $db_pass);
    	$db->setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE, PDO::FETCH_OBJ);
    	$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

    	//without this PDO returns all data as strings
    	$db->setAttribute(PDO::ATTR_EMULATE_PREPARES, false);