Encoding error with add_body_filter

[DarkSorrow]

Haraka version

Git pull from 11 april 2016

Expected behavior

Mail arriving with correct encoding like test rréé èè

Observed behavior

Instead its arriving with test rréé èè

Steps to reproduce

I sent a mail with outlook and a smtp tool (SendSMTP) with a body like "test rréé èè" and "tést" as subject. The subject isn't broken when it arrives on my gmail box, the same code worked in the previous haraka version i had (from december / january). I tried this simple

This is the code i just tried

var plugin = exports
//var fs = require('fs');

exports.register = function () {
        plugin.register_hook('data', 'add_hfcontent');
}

exports.add_hfcontent = function (next, connection) {
        connection.transaction.notes.banner = false;
        connection.logcrit("inside the filter beginning");
        connection.transaction.add_body_filter('text/html', function (ct, enc, buf) {
            return(buf);
        });
        return next();
}

[DarkSorrow]

I tried commenting the add_body_filter and send the mail and i could see it on gmail without the accentueted characters broken