title: ErrorDocument 404 just shows "404"
body: <p>I have setted up my .htaccess with some bundles of rewrites, although when I go to an invalid directory which the ErrorDocument 404 is already set up, it just shows "404" on the page, nothing else, just a plain text with "404".</p>
  
  <pre><code>RewriteEngine on
  
  RewriteBase /
  RewriteRule ^404/?$ 404.php
  
  ErrorDocument 404 404
  </code></pre>
  
  <p>Why doesn't it show the 404 page, if I go to <code>404.php</code> or <code>http://www.mydomain.com/404</code> it shows just fine, why won't it show the page?</p>