[fw-general] Zend_Validate_Hostname and accented character

[Antonio Caccese]

Hi,
i have the following element in a form.

        $localDomain = new Zend_Form_Element_Text('local');
        $localDomain ->setFilters(array('StringTrim', 'StringToLower'))
                ->setDecorators(array('ViewHelper', 'Errors'))
                ->addValidators(array(
                    new 
Zend_Validate_Hostname(Zend_Validate_Hostname::ALLOW_LOCAL)
                ));
With accented characters (à è ì ò ù) the form is validated correctly but 
an empty message is displayed

<ulclass="errors">
<li></li>
</ul>

and the input is't populated again.
Zend Framework version 1.11.2

Any suggestions?

Thanks
Antonio Caccese