some question with Quixote and Nginx

[smalfish]

hi,
  i have some question with this,quixote publish width FastCGI.the two
scripts like this(root.ptl and hello.ptl):

class RootDirectory(Directory):
    _q_exports = ["", "hello"]

    def _q_index [html] (self):
        """
        <h4>Hello,Blog</h4>
        <li><a href="hello/">hello</a></li>
        """
    hello = HelloDirectory()

class HelloDirectory(Directory):
    _q_exports = ["", "hi"]

    def _q_index [html] (self):
        """
        <h4>hello page</h4>
        <li><a href="/">back home</a></li>
        """

    def hi [html] (self):
        """
        aaaaaaaaaaa
        """

now, on the firefox input:
http://localhost/hello/  --> this ok
http://localhost/hello  --> this will forward http://localhost/hello/hello/
, error.

other:
http://localhost/hello/hi  --> this ok
http://localhost/hello/hi/ --> http://localhost/hello/hi//hello/hi/

i think,some problem with Nginx(PATH_INFO is not correct.)

==================================
nginx.conf:
location / {
     fastcgi_pass 127.0.0.1:8000;
     fastcgi_param SERVER_NAME nginx;
     fastcgi_param PATH_INFO $request_uri;
     fastcgi_param SCRIPT_NAME $fastcgi_script_name;
     fastcgi_param REQUEST_METHOD $request_method;
     fastcgi_param QUERY_STRING $query_string;
     fastcgi_param CONTENT_TYPE $content_type;
     fastcgi_param CONTENT_LENGTH $content_length;
     fastcgi_intercept_errors off;
}

fastcgi:
spawn-fcgi -a 127.0.0.1 -p 8000 -f fastcgi_server.py -u nginx -P /var/
log/nginx/qfcgi.pid


thanks!