Crazy problem: controllers don't load

[eluser]swissbastian[/eluser]
[quote author="bradym" date="1211702090"]What do you have $config['uri_protocol'] in config.php set to in the working installs[/quote]

On the working install this variable is set to AUTO. There it works well. I now set it in the other install to REQUEST_URI and everything seem to work!

Thank you so much for your support!