I logged in today and saw that WordPress is updated. This brings up the issue of backing up your database. It is good practice ANYWAY, even if you are not upgrading the script, to make backups of your precious data. I learned the hard way when my server crashed back in April and I lost my WordPress database completely. I found a link to a site that gives you information on how to backup your database using a cronjob. Basically, a cronjob is a scheduled task that can run at given intervals. This can be setup via a control panel or via an SSH terminal.
http://www.tamba2.org.uk/wordpress/cron/
I ran into the problem on my VPS. I didn’t have mutt installed by default and because of this I thought about modifying the script to allow for daily backups to be made and the previous one to be deleted. If you are interested in this script contact me and I’ll be happy to give it to you.