I installed a new WordPress blog today on a server. The site is served by Apache using virtual hosting. I kept getting 404 errors trying to access any page that required mod_rewrite, pretty much other than the home page and administrative pages.

It turned out that I forgot the following in the Apache httpd.conf file:

<VirtualHost *:80>
...
  <Directory /path/to/wordpress/root>
    Options +FollowSymlinks
    AllowOverride FileInfo
  </Directory /path/to/wordpress/root>
</VirtualHost *:80>