It took me some time. But I managed to install nginx and I can say that this issue is probably an issue of your nginx .conf files. I'm using basically the .conf files form this WP Codex page: http://codex.wordpress.org/Nginx
for a single blog (without cache plugins) with a few minor differences:
worker_processes 1; instead of
(I have installed my nginx stack on a Windows computer and if I set this value to one I get 2 process which are enough.)
rewrite ^ $scheme://mysite.com$uri redirect; instead of
rewrite ^ $scheme://mysite.com$request_uri redirect;
(This better when you use the default Permalinks scheme. Using
$request_uri doubled the query arguments.)
in the nginx.conf file.
If you use the Multisite example it is better to use
fastcgi_pass php instead of
fastcgi_pass unix:/var/run/php-fpm/php-fpm.sock;. Because the php definition is defined at the main conf file and can be edited centrally. (If you would edit the central setting and do not edit also the setting in the wordpress.conf file then it would lead to problems.)
The statistics feature works and the server resolves the podPress URL scheme on my server.
If you are interested in my config files then I will post them of course. But these files are adjusted for an installation on a local Windows computer.