What's the URL of the page containing the problem?
http://www.review-board.org/docs/manual/dev/admin/sites/creating-sites/#creatingsites
Describe the problem and any recommendations below.
On Ubuntu 9.04, using apache2 and mod_python, the permissions to the
database need to be set correctly in order to get Ubuntu to work. You need
to issue the following command, or you will get an error 404 when going to
the review board site, and an error 500 when attempting to log in.
"chown -R www-data /var/www/reviews.example.com/db"
Please provide any additional information below.