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+#############################
+Upgrading from 2.1.0 to 2.1.1
+#############################
+
+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" folder and replace
+your index.php file. If any modifications were made to your index.php
+they will need to be made fresh in this new one.
+
+.. note:: If you have any custom developed files in these folders please
+	make copies of them first.
+
+Step 2: Replace config/mimes.php
+================================
+
+This config file has been updated to contain more user mime-types, please copy
+it to _application/config/mimes.php*.
+
+Step 3: Update your IP address tables
+=====================================
+
+This upgrade adds support for IPv6 IP addresses. In order to store them, you need
+to enlarge your ip_address columns to 45 characters. For example, CodeIgniter's
+session table will need to change
+
+::
+
+	ALTER TABLE ci_sessions CHANGE ip_address ip_address varchar(45) default '0' NOT NULL