I just tried to manually upgrade to wordpress 3.0.4
Once I open the admin page it states:
Database Upgrade Required
WordPress has been updated! Before we send you on your way, we have to upgrade your database to the newest version.
The upgrade process may take a little while, so please be patient."
After the upgrade process it shows
Your WordPress database has been successfully upgraded!
When I press continue, it goes back to the page which says Database Upgrade Required and this process over and over.