This is a partial HTTP header from IIS:

HTTP/1.1 302 Redirect
Server: Microsoft-IIS/5.0
Date: Wed, 06 Mar 2002 19:41:34 GMT
P3P: CP='ALL IND DSP COR ADM CONo CUR CUSo IVAo IVDo 
PSA PSD TAI TELo OUR SAMo CNT COM INT NAV ONL PHY PRE 
PUR UNI'
Location: 
http://www.microsoft.comhttp://support.microsoft.com/de
fault.aspx?LN=RU

Notice the 'Location:'; this causes a ValueError 
exception in httplib in class HTTPConnection, method
_set_hostport(): port = int(host[i+1:])

I fixed this by doing:

  try: port = int(host[i+1:])
  except ValueError: raise InvalidHost(host)

and adding: 

class InvalidHost(HTTPException):
	def __init__(self, host):
		self.host = host
	def __str__(self):
		return "invalid host- '%s'" % self.host

Logged In: YES 
user_id=31392

Already fixed by Skip in rev 1.48 & 1.49.