All requests to a non-existent file should be re-written to index.php?name=$1

All other requests should be processed as normal.

With this server block, the server is trying to download all non-existent urls:

server {
    server_name  www.domain.com;
    rewrite ^(.*) http://domain.com$1 permanent;
}

server {
    listen 80;
    server_name  domain.com;
    client_max_body_size 500M;
    index index.php index.html index.htm;

    root   /home/username/public_html;

    location ~ /\.ht {
        deny  all;
    }

    location ~ \.php$ {
        try_files $uri = 404;
        fastcgi_split_path_info ^(.+\.php)(/.+)$;
        include fastcgi_params;
        fastcgi_index index.php;
        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
        fastcgi_pass 127.0.0.1:9002;
    }

    location ~* ^.+\.(ogg|ogv|svg|svgz|eot|otf|woff|mp4|ttf|rss|atom|jpg|jpeg|gif|png|ico|zip|tgz|gz|rar|bz2|doc|xls|exe|ppt|tar|mid|midi|wav|bmp|rtf)$ {
        access_log off; 
        log_not_found off; 
        expires max;
    }

    location /plg {
    }

    location / {
        if (!-f $request_filename){
            rewrite ^(.*)$ /index.php?name=$1 break;
        }
    }
}

I've checked to see that my default_type = text/html instead of octet stream, not sure what the deal is.