Index: Lib/urllib/request.py
===================================================================
--- Lib/urllib/request.py	(revision 82985)
+++ Lib/urllib/request.py	(working copy)
@@ -1262,8 +1262,8 @@
         else:
             passwd = None
         host = unquote(host)
-        user = unquote(user or '')
-        passwd = unquote(passwd or '')
+        user = user or ''
+        passwd = passwd or ''
 
         try:
             host = socket.gethostbyname(host)
Index: Lib/urllib/parse.py
===================================================================
--- Lib/urllib/parse.py	(revision 82985)
+++ Lib/urllib/parse.py	(working copy)
@@ -712,7 +712,7 @@
         _userprog = re.compile('^(.*)@(.*)$')
 
     match = _userprog.match(host)
-    if match: return map(unquote, match.group(1, 2))
+    if match: return match.group(1, 2)
     return None, host
 
 _passwdprog = None