<?php Prado::using('System.Web.UI.ActiveControls.*'); class Issue524 extends TPage { public function __construct() { Prado::getApplication()->getGlobalization()->setCharset('ISO-8859-1'); parent::__construct(); } public function validateText($sender, $param) { $param->IsValid = false; $iso8859text=iconv('utf-8', 'iso-8859-1', 'fünf'); $this->Validator->ErrorMessage = $iso8859text; } }