strange routing error? Autoload not being called on some 404's.

[eluser]CroNiX[/eluser]
Here is a good article on a 404 controller that lets you use the CI superglobal. I use this in all of my projects so I can generate dynamic 404 pages (like getting data from the db, logging the 404 in the database, etc).
http://maestric.com/doc/php/codeigniter_404