khosb/application/classes/http/exception/404.php

<?php defined('SYSPATH') or die('No direct access allowed.');

/**
 * This class overrides Kohana's 404 Exception
 *
 * @package    lnApp/Modifications
 * @category   Classes
 * @category   Helpers
 * @author     Deon George
 * @copyright  (c) 2010 Deon George
 * @license    http://dev.leenooks.net/license.html
 */
class HTTP_Exception_404 extends Kohana_HTTP_Exception_404 {
	public function __construct($message, array $variables = NULL, $code = 0)
	{
		set_exception_handler(array(get_class($this),'handler'));
		parent::__construct($message, $variables, (int) $code);
	}

	public static function handler(Exception $e)
	{
		SystemMessage::add(array(
			'title'=>_('Page not found'),
			'type'=>'error',
			'body'=>sprintf(_('The page [%s] you requested was not found?'),Request::detect_uri()),
		));

		Request::factory()->redirect('welcome');
	}
}
?>