Hello,
I'm quite new to Nginx, but so far i've had reasonable success in getting things to work, until I try and use the Sympa mailing list web interface.

With this config:

server {
listen 80;
server_name www.tld.co.uk;


location /static-sympa {
alias /var/lib/sympa/static_content;
}

location /sympa {
root /usr/lib/cgi-bin/sympa;
gzip off;
fastcgi_pass unix:/etc/php5/fpm/socks/www.tld.co.uk.sock;
fastcgi_split_path_info ^(/sympa)(.+)$;
include /etc/nginx/fastcgi_params;
fastcgi_param PATH_INFO $fastcgi_path_info;
fastcgi_param REMOTE_USER $remote_user;
fastcgi_param SCRIPT_FILENAME $document_root/wwsympa-wrapper.fcgi;
fastcgi_intercept_errors on;
}

And with this in the /etc/nginx/fastcgi_params file:

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_FILENAME $request_filename;
fastcgi_param PATH_INFO $fastcgi_script_name;
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 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;


On trying to access www.tld.co.uk/sympa I get nothing at all in the Nginx error log, and the following in the Nginx access log:
<client IP> - - [18/May/2014:23:00:04 +0100] "GET /sympa HTTP/1.1" 200 6205 "-" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/33.0.1750.152 Safari/537.36"

Even with php5-fpm configured for debug logging, nothing happens in the php5-fpm.log file either (and I can see that things do happen in this file for other Nginx web pages like postfixadmin or roundcube, so am reasonably confident that php5-fpm is correct).

What puzzles me most is that what gets posted to the clients web browser when visiting www.tld.co.uk/sympa is the following:

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I hope that somebody on this list can please help me understand what it is doing.

Many Thanks in advance!