diff -r 29bdbcadf299 Lib/collections.py
--- a/Lib/collections.py	Thu Aug 02 03:00:33 2012 +0300
+++ b/Lib/collections.py	Fri Aug 31 21:53:47 2012 +0200
@@ -271,6 +271,10 @@
             raise ValueError('Got unexpected field names: %r' % kwds.keys())
         return result
 
+    def __getstate__(self):
+        # Prevent pickle protocol 0 from also dumping an OrderedDict.
+        return None
+
     def __getnewargs__(self):
         'Return self as a plain tuple.  Used by copy and pickle.'
         return tuple(self)
diff -r 29bdbcadf299 Lib/test/test_collections.py
--- a/Lib/test/test_collections.py	Thu Aug 02 03:00:33 2012 +0300
+++ b/Lib/test/test_collections.py	Fri Aug 31 21:53:47 2012 +0200
@@ -169,6 +169,8 @@
                 q = loads(dumps(p, protocol))
                 self.assertEqual(p, q)
                 self.assertEqual(p._fields, q._fields)
+        self.assertNotIn('OrderedDict', pickle.dumps(p, 0))
+        self.assertNotIn('OrderedDict', cPickle.dumps(p, 0))
 
     def test_copy(self):
         p = TestNT(x=10, y=20, z=30)
@@ -191,6 +193,7 @@
             T = namedtuple('T', 'x', verbose=True)
         words = set(re.findall('[A-Za-z]+', template.getvalue()))
         words -= set(keyword.kwlist)
+        words -= {'None'}
         T = namedtuple('T', words)
         # test __new__
         values = tuple(range(len(words)))
diff -r 29bdbcadf299 Misc/ACKS
--- a/Misc/ACKS	Thu Aug 02 03:00:33 2012 +0300
+++ b/Misc/ACKS	Fri Aug 31 21:53:47 2012 +0200
@@ -577,6 +577,7 @@
 Steven Miale
 Trent Mick
 Tom Middleton
+Thomas Miedema
 Stan Mihai
 Aristotelis Mikropoulos
 Damien Miller