CodeIgniter 404 Page Not Found, but why?

[eluser]Mr. Pickle[/eluser]
Are you sure both environments have the same .htaccess and routes file?

BTW, why have

Code:

$route['admin'] = 'welcome';

if the default controller for the admin app already is welcome

Is your production server running PHP as CGI and your local MAMP PHP Apache? -> which caused me some differences in behaviour in the past.