I ended up shutting down
Tomcat, removing the jforum directory from under webapps, copying in a fresh one from the download (except for the logo.jpg file which I set to the new one I wanted), started up Tomcat, and ran the install.jsp again. When it was all done, I *still* had the squirrel at the top of my forum. I have no idea what else to try.
[originally posted on jforum.net by mbongiov]