First..

2009/10/8 pepejose <nginx-forum@nginx.us>
>        server{
>                listen *:80;
>                #mod rewrite wordpress
>
>                  rewrite ^.*/files/(.*) /wp-content/blogs.php?file=$1;
>                          if (!-e $request_filename) {
>                                rewrite ^.+?(/wp-.*) $1 last;
>                                rewrite ^.+?(/.*\.php)$ $1 last;
>                                rewrite ^ /index.php last;
>                          }

you don't need that

>        #Proxy the PHP scripts to Apache listening on 127.0.0.1:8080
>        location ~ \.php$ {
>                        proxy_set_header Host $host;
>                        proxy_set_header X-Real-IP $remote_addr;
>                        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
>                        proxy_pass   http://127.0.0.1:8080;
>        }
>        }
>

If you are proxy to apache, you don't need rewrite in nginx but only
rules in .htaccess for apache. set up nginx for static content only.

--
Best Regards
Grzegorz Sieńko