SF bug #422121 Insecurities in dict comparison.
Fixed a half dozen ways in which general dict comparison could crash
Python (even cause Win98SE to reboot) in the presence of kay and/or
value comparison routines that mutate the dict during dict comparison.
Bugfix candidate.
diff --git a/Misc/NEWS b/Misc/NEWS
index 7906613..8b4021f 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -47,6 +47,11 @@
 - Comparing dictionary objects via == and != is faster, and now works even
   if the keys and values don't support comparisons other than ==.
 
+- Comparing dictionaries in ways other than == and != is slower:  there were
+  insecurities in the dict comparison implementation that could cause Python
+  to crash if the element comparison routines for the dict keys and/or
+  values mutated the dicts.  Making the code bulletproof slowed it down.
+
 
 What's New in Python 2.1 (final)?
 =================================