Hi Mathias,
Thanks for your answer. That won't do it unfortunately. Also tried moving the "try_files" param out of the "location /" bracket - no luck with that either.
What I did when setting up Nginx was following the instructions in the /etc/nginx/sites-available/default config file. So I created my new file containing the above config in "/etc/nginx/sites-available/local" and made a symlink to it in "etc/nginx/sites-enabled".
I then restarted Nginx. I've messed around with the settings in my "local" file and seen PHP stopped working completely, so I know that Nginx actually are loading my config, but just ignore to call my index.php when the URL ends with / or /index.php...