With the FC4-re0404.0 tree

Traceback (most recent call last):
File /usr/bin/anaconda, line 1168 in ?
anaconda/text.py, line 497, in run
...
anaconda/packages.py, line 158, in readPackages
   hdrlist = method.readHeaders()
anaconda/urlinstall.py line 170 in readHeaders
  url = grabber.urlopen(hdurl, retry=5)
urlgrabber/grabber.py, line 444, in urlopen
  return default_grabber.urlopen(url, **kwargs)
urlgrabber/grabber.py, line 575, in urlopen
  return self._retry(opts, retryfunc, url)
urlgrabber/grabber.py, line 547, in _retry
urlgrabber/grabber.py, line 574, in retryfunc
urlgrabber/grabber.py, line 727, in __init__
urlgrabber/grabber.py, line 794, in _do_open
urlgrabber/grabber.py, line 885, in _make_request
urllib2.py, line 358, in open
urllib2.py, line 376, in _open
urllib2.py, line 337, in _call_chain
urllib2.py, line 213, in http_open
urlgrabber/keepalive.py, line 240, in do_open
urlgrabber/keepalive.py, line 315, in _start_transaction
    h.putrequest('GET', req.get_selector())
httplib.py, line 748, in putrequest.py
    self.putheader('Host', self.host.encode("idna"))
LookupError: unknown encoding: idna