$route['404_override'] not sending 301 status code with redirection to custom error page

[eluser]Flemming[/eluser]
I realise this is an old thread but thought I would post my answer in case anyone else is still having this problem (with the 404 override sending a 200 OK status)

In your custom error controller add:

Code:

$this->output->set_status_header('404');

before you load the views.

Worked for me, hopefully it will help others :-)