Index: Lib/urlparse.py
===================================================================
--- Lib/urlparse.py	(revision 63658)
+++ Lib/urlparse.py	(working copy)
@@ -102,8 +114,9 @@ class BaseResult(tuple):
         netloc = self.netloc
         if "@" in netloc:
             netloc = netloc.split("@", 1)[1]
-        if ":" in netloc:
-            netloc = netloc.split(":", 1)[0]
+        if netloc and netloc[-1] != ']' and ":" in netloc:
+            netloc = netloc.rsplit(":", 1)[0]
+        # FIXME: Remove the '[' ']' if RFC2732 IPv6 adress?
         return netloc.lower() or None
 
     @property
@@ -111,8 +124,8 @@ class BaseResult(tuple):
         netloc = self.netloc
         if "@" in netloc:
             netloc = netloc.split("@", 1)[1]
-        if ":" in netloc:
-            port = netloc.split(":", 1)[1]
+        if netloc and netloc[-1] != ']' and ":" in netloc:
+            port = netloc.rsplit(":", 1)[1]
             return int(port, 10)
         return None