I installed WP from Fantastico, then imported posts and categories from my old blog.
The main index works and the admin works, but single posts, monthly archives and categories don't work at all.
I tried switching themes. I tried upgrading to WP 2.5 -- same problem.
When I try to go to http://linkedintelligence.com/category/blogging/
The requested URL /category/blogging/ was not found on this server.
Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.