Second page (and next) of search results redirects me to the home page

Question

WP 3.5, nginx (latest) and PHP5-FPM (latest). If you visit http://bombacarta.com/?s=coma the page is properly loaded. When you click on the link to go to the next page, you are redirected to the home page. Try it out: http://bombacarta.com/page/2/?s=coma

I don't know what's the cause to this... I think it's something related to my nginx conf for WP (because it happens on also another installation on the same VPS with same config but different theme). Here's my nginx config:

location ~ \.php$ {
    try_files $uri =404;
    fastcgi_split_path_info ^(.+\.php)(/.+)$;           
    include /etc/nginx/fastcgi.conf;
    fastcgi_pass unix:/var/run/php5-fpm.sock;
}

location / {
# if you're just using wordpress and don't want extra rewrites
# then replace the word @rewrites with /index.php
 try_files $uri $uri/ /index.php;

}

Answer 1

Solved changing the location block with this:

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