I dragged the About menu out of the navigation menu. After a few minutes of navigating around, the site then times out and never loads any pages (or, actually, takes like 5 minutes to load anything into the page). After a long time, an error finally dumps to the browser:
Warning: mysql_error(): supplied argument is not a valid MySQL-Link resource in /home/xxxxxx/public_html/inc/classes/BxDolDb.php on line 431
Fatal error: Call to a member function getParam() on a non-object in /home/xxxxxx/public_html/inc/db.inc.php on line 83
I'm going to try a restore to the most recent database backup.