Running Simple Groupware On Nginx (LEMP) On Debian Squeeze/Ubuntu 11.10

[...]
memory_limit = 512M
[...]
post_max_size = 512M
[...]
upload_max_filesize = 512M
[...]

server {
       listen 80;
       server_name www.example.com example.com;
       root /var/www/www.example.com/web;

       if ($http_host != "www.example.com") {
                 rewrite ^ http://www.example.com$request_uri permanent;
       }

       location = /favicon.ico {
                log_not_found off;
                access_log off;
                expires max;
       }

       location = /robots.txt {
                allow all;
                log_not_found off;
                access_log off;
       }

       # Deny all attempts to access hidden files such as .htaccess, .htpasswd, .DS_Store (Mac).
       location ~ /\. {
                deny all;
                access_log off;
                log_not_found off;
       }

       client_max_body_size 1000M;
       dav_methods PUT DELETE MKCOL COPY MOVE;
       create_full_put_path on;
       dav_access user:rw group:rw all:r;

       # WebDAV server
       location ~ ^/sgdav {
                rewrite . /bin/webdav.php;
       }
       # CMS real URLs
       location ~ ^/cms/ {
                rewrite ^/cms/ext/(.*)$ /bin/ext/cms/$1 last;
                rewrite ^/cms/thumbs/(.*)$ /bin/preview.php?filename=$1 last;
                rewrite ^/cms/(.*?)/file/(.*)$ /bin/cms.php?page=$1&file=$2 last;
                rewrite ^/cms/(.*)$ /bin/cms.php?page=$1 last;
       }
       # Root
       location = / {
                if ($request_method = "OPTIONS") {
                   rewrite . /bin/webdav.php last;
                }
                try_files /bin/index.php /src/index.php /sgs_installer.php =404;

                include /etc/nginx/fastcgi_params;
                fastcgi_param  SCRIPT_FILENAME  $document_root$fastcgi_script_name;
                fastcgi_pass   127.0.0.1:9000; # use spawn-fcgi (!!)
       }
       # Root PHP /*.php
       location ~ ^/([^/]+\.php)$ {
                try_files /bin/$1 /src/$1 $uri =404;
                include /etc/nginx/fastcgi_params;
                fastcgi_param  SCRIPT_FILENAME  $document_root$fastcgi_script_name;
                fastcgi_pass   127.0.0.1:9000; # use spawn-fcgi (!!)
       }
       # sgs src/*.php bin/*.php
       location ~ ^/(src|bin)/([^/]+\.php|ext/.+\.php)$ {
                include /etc/nginx/fastcgi_params;
                fastcgi_param  SCRIPT_FILENAME  $document_root$fastcgi_script_name;
                fastcgi_pass   127.0.0.1:9000; # use spawn-fcgi (!!)
       }
       # Redirect static files
       location ~ ^/(src/|bin/)?(ext/.*|docs/.*)$ {
                try_files /custom/$2 /ext/$2 /bin/$2 /src/$2 $uri =404;
       }
       # Drop all other stuff
       location / {
                if (!-f $request_filename) { return 404; }
                #return 403;
       }
}