I have a site that has been up for a couple of years and has gone through multiple upgrades. Today I upgraded to WP 3.0.1 and now I don't see content in my admin area after logging in. The upgrade appeared to succeed with no error messages, but the admin section is not functioning. I see the navigation bar on the left and the URLs are fully qualified when I click on each navigation item, but nothing appears in the content area.
The site itself is viewable, I just can't see anything in the admin area when I've logged in as an administrator.