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+#############################
+Upgrading from 3.0.5 to 3.0.6
+#############################
+
+Before performing an update you should take your site offline by
+replacing the index.php file with a static one.
+
+Step 1: Update your CodeIgniter files
+=====================================
+
+Replace all files and directories in your *system/* directory.
+
+.. note:: If you have any custom developed files in these directories,
+	please make copies of them first.
+
+Step 2: Update your index.php file (optional)
+=============================================
+
+We've made some tweaks to the index.php file, mostly related to proper
+usage of directory separators (i.e. use the ``DIRECTORY_SEPARATOR``
+constant instead of a hard coded forward slash "/").
+
+Nothing will break if you skip this step, but if you're running Windows
+or just want to be up to date with every change - we do recommend that
+you update your index.php file.
+
+*Tip: Just copy the ``ENVIRONMENT``, ``$system_path``, ``$application_folder``
+and ``$view_folder`` declarations from the old file and put them into the
+new one, replacing the defaults.*
+
+Step 3: Remove 'prep_for_form' usage (deprecation)
+==================================================
+
+The :doc:`Form Validation Library <../libraries/form_validation>` has a
+``prep_for_form()`` method, which is/can also be used as a rule in
+``set_rules()`` to automatically perform HTML encoding on input data.
+
+Automatically encoding input (instead of output) data is a bad practice in
+the first place, and CodeIgniter and PHP itself offer other alternatives
+to this method anyway.
+For example, :doc:`Form Helper <../helpers/form_helper>` functions will
+automatically perform HTML escaping when necessary.
+
+Therefore, the *prep_for_form* method/rule is pretty much useless and is now
+deprecated and scheduled for removal in 3.1+.
+
+.. note:: The method is still available, but you're strongly encouraged to
+	remove its usage sooner rather than later.