This happened to me. Most likely the index.php file got corrupted when you when upgraded. To fix this, take a look at the index.php file. Delete the old index.php file and insert a fresh one from the wordpress zip update. The file should look like this:
<?php
/**
* Front to the WordPress application. This file doesn’t do anything, but loads
* wp-blog-header.php which does and tells WordPress to load the theme.
*
* @package WordPress
*/
/**
* Tells WordPress to load the WordPress theme and output it.
*
* @var bool
*/
define(‘WP_USE_THEMES’, true);
/** Loads the WordPress Environment and Template */
require(‘./wp-blog-header.php’);
?>
Voila
Hope this helps.
Von D.
Penned In Comic
http://www.pi-comic.com