I'm new to nginx, and I'm trying to make my first server run. I followed this guide as I'm trying to use it for a multisite wordpress site.

After installing everything, I get a 500 Internal server error. If I check logs, I see this:

012/09/27 08:55:54 [error] 11565#0: *8 rewrite or internal redirection cycle while internally redirecting to "/index.html", client: xxx.xxx.xxx.xxx, server: localhost, request: "GET /favicon.ico HTTP/1.1", host: "www.mydomain.com"
2012/09/27 08:59:32 [error] 11618#0: *1 rewrite or internal redirection cycle while internally redirecting to "/index.html", client: xxx.xxx.xxx.xxx, server: localhost, request: "GET /phpmyadmin HTTP/1.1", host: "www.mydomain.com"

My conf files are the following:

nano /etc/nginx/sites-available/mydomain.com

server {
    listen       80 default_server;
    server_name  mydomain.com *.mydomain.com;
    root /srv/www/aciup.com/public;

    access_log   /srv/www/mydomain.com/log/access.log;
    error_log    /srv/www/mydomain.com/log/error.log;

 location / {
        index index.php;
        try_files $uri $uri/ /index.php?$args;
    }

    # Add trailing slash to */wp-admin requests.
    rewrite /wp-admin$ $scheme://$host$uri/ permanent;

    # Directives to send expires headers and turn off 404 error logging.
    location ~* \.(js|css|png|jpg|jpeg|gif|ico)$ {
        expires 24h;
        log_not_found off;
    }

    # this prevents hidden files (beginning with a period) from being served
              location ~ /\.          { access_log off; log_not_found off; deny all; }

    # Pass uploaded files to wp-includes/ms-files.php.
    rewrite /files/$ /index.php last;

    if ($uri !~ wp-content/plugins) {
        rewrite /files/(.+)$ /wp-includes/ms-files.php?file=$1 last;
    }

    # Rewrite multisite '.../wp-.*' and '.../*.php'.
    if (!-e $request_filename) {
        rewrite ^/[_0-9a-zA-Z-]+(/wp-.*) $1 last;
        rewrite ^/[_0-9a-zA-Z-]+.*(/wp-admin/.*\.php)$ $1 last;
        rewrite ^/[_0-9a-zA-Z-]+(/.*\.php)$ $1 last;
    }

    location ~ \.php$ {
        client_max_body_size 25M;
        fastcgi_pass   unix:/var/run/php5-fpm.sock;
        fastcgi_index  index.php;
        include        /etc/nginx/fastcgi_params;
    }
}

nano /etc/nginx/nginx.conf

user              www-data;
worker_processes  4;
worker_cpu_affinity 0001 0010 0100 1000;
error_log         /var/log/nginx/error.log;
pid               /var/run/nginx.pid;

events {
    worker_connections  2048;
}

http {
    include     /etc/nginx/mime.types;
    access_log  /var/log/nginx/access.log;

    sendfile            on;
    tcp_nopush          on;
    keepalive_timeout   5;
    tcp_nodelay         on;
    server_tokens       off;

    gzip          on;
    gzip_types text/plain text/css application/x-javascript text/xml application/xml application/xml+rss text/javascript;
    gzip_disable  "MSIE [1-6]\.(?!.*SV1)";

    include /etc/nginx/conf.d/*.conf;
    include /etc/nginx/sites-enabled/*;
}

Any help will be appreciated.