[cflsystems]

Hey Tim, I looked one more time on this issue for you and it seems you are not the only one experiencing something like this.

"mb-convert-encoding" is a PHP function - http://www.php.net/manual/en/function.mb-convert-encoding.php

Also this one talks about it - http://gallery.menalto.com/node/30054

I think the function in your case would be this one from JsHttpRequest.php

    function _unicodeConv($fromEnc, $toEnc, $v)
    {
        if ($this->_unicodeConvMethod == 'iconv') {
            return iconv($fromEnc, $toEnc, $v);
        } 
        return mb_convert_encoding($v, $toEnc, $fromEnc);
    }

And maybe if you replace it with this will make the error disappear (or I can do it for you)

    function _unicodeConv($fromEnc, $toEnc, $v)
    {
        if ($this->_unicodeConvMethod == 'iconv') {
            return iconv($fromEnc, $toEnc, $v);
        } 
        if ($fromEnc == NULL) {
   return mb_convert_encoding($v, $toEnc);
  } else {
   return mb_convert_encoding($v, $toEnc, $fromEnc);
  }
    }

(posted here just in case anyone else is experiencing same problem)