Additionally, this release allows one to create a custom database error page. If WordPress encounters a problem connecting to the database, it will show the template located at wp-content/db-error.php rather than the default error message. If you would like to customize your DB error, just create a template file, name it “db-error.php” and upload it to your site’s wp-content directory.
By the way, if you are not using subversion to manage your WordPress installations, you should start. It makes life much, much easier at upgrade time.