Index: Objects/dictobject.c
===================================================================
--- Objects/dictobject.c	(revision 52915)
+++ Objects/dictobject.c	(working copy)
@@ -9,6 +9,9 @@
 
 #include "Python.h"
 
+//#define MANGLE_HASH(h)       (h)
+#define MANGLE_HASH(h)       ((h) ^ 1291)
+
 typedef PyDictEntry dictentry;
 typedef PyDictObject dictobject;
 
@@ -237,7 +240,7 @@
 	PyObject *err_type, *err_value, *err_tb;
 	PyObject *startkey;
 
-	i = hash & mask;
+	i = MANGLE_HASH(hash) & mask;
 	ep = &ep0[i];
 	if (ep->me_key == NULL || ep->me_key == key)
 		return ep;
@@ -354,7 +357,7 @@
 		mp->ma_lookup = lookdict;
 		return lookdict(mp, key, hash);
 	}
-	i = hash & mask;
+	i = MANGLE_HASH(hash) & mask;
 	ep = &ep0[i];
 	if (ep->me_key == NULL || ep->me_key == key)
 		return ep;
@@ -433,7 +436,7 @@
 	dictentry *ep0 = mp->ma_table;
 	register dictentry *ep;
 
-	i = hash & mask;
+	i = MANGLE_HASH(hash) & mask;
 	ep = &ep0[i];
 	for (perturb = hash; ep->me_key != NULL; perturb >>= PERTURB_SHIFT) {
 		i = (i << 2) + i + perturb + 1;