--- /usr/lib/python/urllib2.py	2008-01-10 19:03:55.000000000 +0100
+++ urllib2.py	2008-03-11 21:25:33.523890670 +0100
@@ -261,13 +261,16 @@ class Request:
     def is_unverifiable(self):
         return self.unverifiable
 
+    def _cap_header_key(self, key):
+        return '-'.join((ck.capitalize() for ck in key.split('-')))
+
     def add_header(self, key, val):
         # useful for something like authentication
-        self.headers[key.capitalize()] = val
+        self.headers[self._cap_header_key(key)] = val
 
     def add_unredirected_header(self, key, val):
         # will not be added to a redirected request
-        self.unredirected_hdrs[key.capitalize()] = val
+        self.unredirected_hdrs[self._cap_header_key(key)] = val
 
     def has_header(self, header_name):
         return (header_name in self.headers or