Recently, my WordPress installation got hosed. Actually, I think my PHP installation got hosed. Anyway, I reinstalled PHP5, but after that, I could no longer access WordPress (something to do with a missing MYSQL extension).
So I reinstalled MYSQL. I then reinstalled WordPress with the latest version (my old version was very, very old). I recreated wp-config.php, matching the same database name, username, etc., as my previous installation.
The Dashboard shows that all of my posts are intact, thankfully. However, in the browser, I can no longer visit any of the categories; I keep getting "The requested URL /wordpress/category/articles/ was not found on this server."
All the categories show up in the Dashboard, so I don't understand why I'm getting that error message. Apparently, my WordPress recovery is not quite complete; something is missing. But what is it???
Thanks in advance.