The preview frame seems to have a character encoding problem. See attached screen dump. The server is set up to use ISO-8859-15 and the settings in ./languages/danish/strings.php say:
$lang_string['html_charset'] = 'ISO-8859-15';
$lang_string['php_charset'] = 'ISO-8859-15';
I think the problem is Linux use UTF-8 and the javascript in the preview doesn't. Not a big problem, I would just let you know.
Preview frame showing
The Javascript preview just uses a frame. The proper encoding "ISO-8859-15" is defined in the frame HTML. The place where there could be a problem is if the parser.php isn't getting the text properly through the POST variable.
Looks like in the <form> tag we need to set "accept-charset" to the correct value.
This should be fixed in svn r245. If not we may need to set "enctype" as well.