Tricky Rewrite rules.

[HonDev Developer]

This seems promising - give it a try.

server {
    listen       80;
    server_name  yourmublogs.com *.yourmublogs.com;

    location / {
        root   /home/yourmublogs/public_html;
        index  index.html index.htm index.php;
        rewrite ^.*/files/(.*) /wp-content/blogs.php?file=$1;

        if (!-e $request_filename) {
        rewrite ^.+?(/wp-.*) $1 last;
        rewrite ^.+?(/.*\.php)$ $1 last;

        }

        if ($query_string !~ ".*s=.*") {
         rewrite ^(.*) /wp-content/cache/supercache/$http_host/$1index.html;
        }

        if ($http_cookie !~ "^.*comment_author_.*$" ) {
         rewrite ^(.*) /wp-content/cache/supercache/$http_host/$1index.html;
        }

        if ($http_cookie !~ "^.*wordpressuser.*$" ) {
         rewrite ^(.*) /wp-content/cache/supercache/$http_host/$1index.html;
        }

        if ($http_cookie !~ "^.*wp-postpass_.*$" ) {
         rewrite ^(.*) /wp-content/cache/supercache/$http_host/$1index.html
        break;
        }


        error_page    404  =  @tricky;
        }
        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   html;
        }

        location @tricky {
        rewrite ^ /index.php last;
            fastcgi_pass   127.0.0.1:8095;
            fastcgi_index  index.php;
            fastcgi_param  SCRIPT_FILENAME
/home/yourmublogs/public_html$fastcgi_script_name;
            include        /usr/local/nginx/conf/fastcgi_params;
        }

        location ~ \.php$ {
            fastcgi_pass   127.0.0.1:8095;
            fastcgi_index  index.php;
            fastcgi_param  SCRIPT_FILENAME
/home/yourmublogs/public_html$fastcgi_script_name;
            include        /usr/local/nginx/conf/fastcgi_params;
        }
}