Cannot figure out why this isn't working.

charset.js

var http   = require('http');
var Iconv  = require('iconv').Iconv;
var bt     = require('buffertools');
var google = http.createClient(80, 'www.google.it');
var assert = require('assert');

var request = google.request('GET', '/',
{
 'host': 'www.google.it',
 'Accept-Charset': 'UTF-8',
 // Uncomment this to get the data in UTF-8 (and then it works fine)
 // 'User-Agent':     'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_2) AppleWebKit/535.2 (KHTML, like Gecko) Chrome/15.0.874.106 Safari/535',
 'Accept-Language': 'en-GB',
 'Accept': 'text/html',
}
  );

request.end();

request.on('response', function (response) {
  var bufflist = [];
  response.on('data', function (chunk) {
    bufflist.push(chunk);
  });
  response.on('end', function () {
    var ct = response.headers['content-type'];
    var matches = /\bcharset\s*=\s*(?:\"|3D|')?([\w_\-]*)(?:\"|3D|')?/.exec(ct);
    var enc = 'UTF-8';
    if (matches) {
        enc = matches[1].toUpperCase();
    }

    var iconv = new Iconv(enc, "UTF-8");

    console.log("Converting to: " + enc);
    var outbuf = bt.concat.apply(bt, bufflist);

    // if I do this, it doesn't work right - the data is incorrect and I get:
    // "il server non č riuscito"
    // in the output
    process.stdout.write(iconv.convert(outbuf));

    // If however I comment that out, and uncomment this one, and run:
    //     node scriptname.js | iconv -f ISO-8859-1 -t UTF-8
    // then I get the required output, which contains:
    // "il server non è riuscito"
    //process.stdout.write(outbuf);

  });
});