For the php-noobs (like me) - working with flash and php.
Here's a simple snippet of code that worked great for me, getting php to show special Danish characters, from a Flash email form:
<?php
// Name Escape
$escName = mb_convert_encoding($_POST["Name"], "ISO-8859-1", "UTF-8");
// message escape
$escMessage = mb_convert_encoding($_POST["Message"], "ISO-8859-1", "UTF-8");
// Headers.. and so on...
?>