Hi, while trying to solve the problems with Z39.50 on a RedHat 9.0 box (reported in my previous messages), I tried to install Fedora Core 3 on another computer, and Koha 2.2.0RC5, to see whether those problems depended on the operating system. I performed a standard installation of Fedora Core 3, and closely followed Joshua Ferraro's instructions on www.kohadocs.org (more or less equivalent to the procedures I followed on RedHat 9.0). Result: Koha gets installed without any problem, but on calling the very first page with mozilla: http://localhost:8080 ("Welcome to Koha" flashes rapidly, and then) it moves to http://localhost:8080/cgi-bin/koha/mainpage.pl However, this gives an "Internal Server Error". (Error logs do not provide much more insight.) Any user (including apache, with sudo -u apache) can execute from shell the above script, which produces the expected html output. So, I guess it's a problem with the Apache configuration. What is strange to me, is that httpd.conf and koha-httpd.conf in my Fedora 3 box looks pretty much the same as httpd.conf/koha-httpd.conf in my RedHat 9.0 box. Nor have I made any other change to the standard configuration of Fedora. Any suggestion? Thank you in advance. Giuseppe.