upgrading rawhide

[Alex Thomsen Leth]

i got a problem, when im trying to upgrade via rawhide i got this
message. what could be wrong. sometimes when im trying yum end op
hanging.

Gathering header information file(s) from server(s)
Server: Fedora Core 1.90 - Development Tree
Traceback (most recent call last):
  File "/usr/bin/yum", line 30, in ?
    yummain.main(sys.argv[1:])
  File "/usr/share/yum/yummain.py", line 222, in main
    clientStuff.get_package_info_from_servers(serverlist, HeaderInfo)
  File "/usr/share/yum/clientStuff.py", line 835, in
get_package_info_from_servers
    progress_obj=None)
  File "/usr/share/yum/clientStuff.py", line 1224, in grab
    bandwidth, conf.retries, retrycodes, checkfunc)
  File "/usr/share/yum/urlgrabber.py", line 237, in retrygrab
    progress_obj, throttle, bandwidth)
  File "/usr/share/yum/urlgrabber.py", line 315, in urlgrab
    fo = urllib2.urlopen(url)
  File "/usr/lib/python2.3/urllib2.py", line 129, in urlopen
    return _opener.open(url, data)
  File "/usr/lib/python2.3/urllib2.py", line 326, in open
    '_open', req)
  File "/usr/lib/python2.3/urllib2.py", line 306, in _call_chain
    result = func(*args)
  File "/usr/lib/python2.3/urllib2.py", line 1047, in ftp_open
    fp, retrlen = fw.retrfile(file, type)
  File "/usr/lib/python2.3/urllib.py", line 751, in retrfile
    conn = self.ftp.ntransfercmd(cmd)
  File "/usr/lib/python2.3/ftplib.py", line 328, in ntransfercmd
    if resp[0] != '1':
IndexError: string index out of range