=== modified file 'Lib/copy.py'
--- Lib/copy.py	2009-05-15 16:54:52 +0000
+++ Lib/copy.py	2009-11-27 23:02:13 +0000
@@ -260,6 +260,10 @@
 if PyStringMap is not None:
     d[PyStringMap] = _deepcopy_dict
 
+def _deepcopy_method(x, memo): # Copy instance methods
+    return type(x)(x.im_func, deepcopy(x.im_self, memo), x.im_class)
+_deepcopy_dispatch[types.MethodType] = _deepcopy_method
+
 def _keep_alive(x, memo):
     """Keeps a reference to the object x in the memo.
 

=== modified file 'Lib/test/test_copy.py'
--- Lib/test/test_copy.py	2009-06-30 22:57:08 +0000
+++ Lib/test/test_copy.py	2009-11-27 23:03:46 +0000
@@ -672,6 +672,17 @@
         del d
         self.assertEqual(len(v), 1)
 
+    def test_deepcopy_bound_method(self):
+        class Foo(object):
+            def m(self):
+                pass
+        f = Foo()
+        f.b = f.m
+        g = copy.deepcopy(f)
+        self.assertEqual(g.m, g.b)
+        self.assertTrue(g.b.im_self is g)
+        g.b()
+
 
 def global_foo(x, y): return x+y