php-fpm/nginx giving scripts wrong path info

I use an nginx webserver and I've been trying to stop a problem where sites are given the wrong $_SERVER["PHP_SELF"] variable. This breaks some scripts. The problem seems to be that nginx is giving the wrong variables to FPM.

$_SERVER["PHP_SELF"] is "/index.php/index.php" and it should be "/index.php"

This is the nginx server PHP configuration...

server {
        listen 192.168.0.3:80;
        server_name cacti;
        access_log /home/admin/cacti_access_log;
        error_log /home/admin/cacti_error_log;
        root /var/www/sites/cacti;

        location / {
                index index.php index.html index.htm;
        }

        location ~* \.php$ {
                fastcgi_pass unix:/var/run/php-fpm/admin-socket;
                fastcgi_split_path_info ^(.+\.php)(/.*)$;
                fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
                fastcgi_param PATH_INFO $fastcgi_script_name;
                fastcgi_param  PATH_TRANSLATED    $document_root$fastcgi_path_info;

                include fastcgi_params;
                fastcgi_read_timeout 60;
        }
}

fastcgi_params...

fastcgi_param  QUERY_STRING       $query_string;
fastcgi_param  REQUEST_METHOD     $request_method;
fastcgi_param  CONTENT_TYPE       $content_type;
fastcgi_param  CONTENT_LENGTH     $content_length;

fastcgi_param  SCRIPT_NAME        $fastcgi_script_name;
fastcgi_param  REQUEST_URI        $request_uri;
fastcgi_param  DOCUMENT_URI       $document_uri;
fastcgi_param  DOCUMENT_ROOT      $document_root;
fastcgi_param  SERVER_PROTOCOL    $server_protocol;
fastcgi_param  HTTPS              $https if_not_empty;

fastcgi_param  GATEWAY_INTERFACE  CGI/1.1;
fastcgi_param  SERVER_SOFTWARE    nginx/$nginx_version;

fastcgi_param  REMOTE_ADDR        $remote_addr;
fastcgi_param  REMOTE_PORT        $remote_port;
fastcgi_param  SERVER_ADDR        $server_addr;
fastcgi_param  SERVER_PORT        $server_port;
fastcgi_param  SERVER_NAME        $server_name;

# PHP only, required if PHP was built with --enable-force-cgi-redirect
fastcgi_param  REDIRECT_STATUS    200;