Hi,
this is a combination of a solution proposed here (with a little twist for smile support)

I'm posting here the final changes (without the original)

in file ../components/com_fireboard/fireboard.php (line 129):
[code:1]
$message = urldecode(decode_unicode_url($msgpreview));
[/code:1]

in file [i]../components/com_fireboard/fireboard.php[/i] (line 135):
[code:1]
echo $msgbody;
[/code:1]
[size=2][anything in between should stay as it was before (original 1.0.4)][/size]

somewhere in the same file (I did this at its end), add the described function:
[code:1]
function decode_unicode_url($str) //from the link provided above
{
...
}
[/code:1]


That's it - you can see this working in an Hebrew (utf-8) site: [url=http://www.datecafe.co.il/component/option,com_fireboard/Itemid,5]Date Cafe - Dating[/url]