--- ../vhost/Mailman/MailList.py	2013-05-25 16:00:50.930182026 -0700
+++ Mailman/MailList.py	2013-05-28 16:26:36.696692828 -0700
@@ -250,10 +250,10 @@
             return "%s%s@%s" % (acct, self.umbrella_member_suffix, host)
 
     def GetScriptURL(self, scriptname, absolute=0):
-        # Using "local_part" here works for both site wide lists on
-        # the default url host and for vhost lists on the vhost url host.
-        return Utils.ScriptURL(scriptname, self.web_page_url, absolute) + \
-               '/' + self.local_part
+        return '%s/%s' % (
+                Utils.ScriptURL(scriptname, self.web_page_url, absolute),
+                self.internal_name()
+                )
 
     def GetOptionsURL(self, user, obscure=0, absolute=0):
         url = self.GetScriptURL('options', absolute)