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+#############################
+Upgrading from 1.5.3 to 1.5.4
+#############################
+
+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:
+
+-  application/config/mimes.php
+-  system/codeigniter
+-  system/database
+-  system/helpers
+-  system/libraries
+-  system/plugins
+
+.. note:: If you have any custom developed files in these folders please
+	make copies of them first.
+
+Step 2: Add charset to your config.php
+======================================
+
+Add the following to application/config/config.php
+
+::
+
+	/*     |--------------------------------------------------------------------------     | Default Character Set     |--------------------------------------------------------------------------     |     | This determines which character set is used by default in various methods     | that require a character set to be provided.     |     */     $config['charset'] = "UTF-8";
+
+Step 3: Autoloading language files
+==================================
+
+If you want to autoload any language files, add this line to
+application/config/autoload.php
+
+::
+
+	$autoload['language'] = array();
+
+Step 4: Update your user guide
+==============================
+
+Please also replace your local copy of the user guide with the new
+version.