From 7c08c140da94e63bed2602ebb4a73062bca5b486 Mon Sep 17 00:00:00 2001
From: Ross Lawley <ross.lawley@gmail.com>
Date: Fri, 24 Aug 2012 14:18:45 +0100
Subject: [PATCH] Updated upgrade documents

---
 docs/upgrade.rst | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/docs/upgrade.rst b/docs/upgrade.rst
index d587c392..d01911c9 100644
--- a/docs/upgrade.rst
+++ b/docs/upgrade.rst
@@ -52,6 +52,15 @@ migrate ::
             g.save()
 
 
+item_frequencies
+----------------
+
+In the 0.6 series we added support for null / zero / false values in
+item_frequencies.  A side effect was to return keys in the value they are
+stored in rather than as string representations.  Your code may need to be
+updated to handle native types rather than strings keys for the results of
+item frequency queries.
+
 0.5 to 0.6
 ==========