Forward port only Py3k relevant change in r65642 (giving it a Py3k NEWS entry anyway because of the difference in the changes between the two branches)
diff --git a/Misc/NEWS b/Misc/NEWS
index afbe989..78cae29 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -30,6 +30,12 @@
Library
-------
+- Issue #2235: numbers.Number now blocks inheritance of the default id()
+ based hash because that hash mechanism is not correct for numeric types.
+ All concrete numeric types that inherit from Number (rather than just
+ registering with it) must explicitly provide a hash implementation in
+ order for their instances to be hashable.
+
- Issue #2676: in the email package, content-type parsing was hanging on
pathological input because of quadratic or exponential behaviour of a
regular expression.