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+#############################
+Upgrading from 1.6.1 to 1.6.2
+#############################
+
+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 these files and directories in your "system" folder with the new
+versions:
+
+-  system/codeigniter
+-  system/database
+-  system/helpers
+-  system/language
+-  system/libraries
+
+.. note:: If you have any custom developed files in these folders please
+	make copies of them first.
+
+Step 2: Encryption Key
+======================
+
+If you are using sessions, open up application/config/config.php and
+verify you've set an encryption key.
+
+Step 3: Constants File
+======================
+
+Copy /application/config/constants.php to your installation, and modify
+if necessary.
+
+Step 4: Mimes File
+==================
+
+Replace /application/config/mimes.php with the dowloaded version. If
+you've added custom mime types, you'll need to re-add them.
+
+Step 5: Update your user guide
+==============================
+
+Please also replace your local copy of the user guide with the new
+version.