diff --git a/doc/xdocs/navigation.xml b/doc/xdocs/navigation.xml
index f04744f023..b05e271c06 100644
--- a/doc/xdocs/navigation.xml
+++ b/doc/xdocs/navigation.xml
@@ -41,6 +41,7 @@
+
diff --git a/doc/xdocs/upgrade/upgrade-090-100.html b/doc/xdocs/upgrade/upgrade-090-100.html
new file mode 100644
index 0000000000..f3357b7064
--- /dev/null
+++ b/doc/xdocs/upgrade/upgrade-090-100.html
@@ -0,0 +1,33 @@
+
+
+Acegi Security - Upgrading from version 0.8.0 to 1.0.0
+
+
+Upgrading from 0.9.0 to 1.0.0
+
+
+The following should help most casual users of the project update their
+applications:
+
+
+
+ - The top level package name has changed. Simply find "net.sf.acegisecurity" and replace with
+ "org.acegisecurity".
+
+ - net.sf.acegisecurity.providers.dao.AuthenticationDao is now org.acegisecurity.userdetails.UserDetailsService.
+ The interface signature has not changed. Similarly, User and UserDetails have moved into the latter's package as well.
+ If you've implemented your own AuthenticationDao, you'll need to change the class it's implementing and quite likely
+ the import packages for User and UserDetails.
+
+ - Acegi Security is now localised. In net.sf.acegisecurity you will find a messages.properties. It is
+ suggested to register this in your application context, perhaps using ReloadableResourceBundleMessageSource.
+ If you do not do this, the default messages included in the source code will be used so this change is
+ not critical. The Spring LocaleContextHolder class is used to determine the locale of messages included in
+ exceptions. At present only the default messages.properties is included (which is in English). If
+ you localise this file to another language, please consider attaching it to a
+ new JIRA task
+ so that we can include it in future Acegi Security releases.
+
+
+
+