I upgraded my wiki from what was 1.4.6 running on RHEL 3 Linux, or something close as damn. I now had 1.4.10 on FreeBSD. I made a test install in a directory called testwiki and then installed some extensions, such as Graphviz and Timeline. I also checked that LaTeX formulas worked. Everything seemed fine, so I renamed the site to its original form. Then I rebooted. Now the main page is gone and the extensions stop working. I even renamed the thing back to testwiki and the main page and the extensions work again, but latex is gone for good. What the?