a look at the HTTP headers:

  tahu@laptop:~$ curl -I http://hackful.com/about
  HTTP/1.1 200 OK
  Content-Type: text/html; charset=utf-8
  Connection: keep-alive
  Status: 200
  X-Powered-By: Phusion Passenger (mod_rails/mod_rack) 3.0.11
  X-UA-Compatible: IE=Edge,chrome=1
  ETag: "6972d16343b1a4d0f2a49c9a3174e977"
  Cache-Control: max-age=0, private, must-revalidate
  Set-Cookie: _hackful_session=BAh7B0kiD3Nlc3Npb25faWQGOgZFRkkiJWQ5NzYzMThlNDFkOWVhYTI1YzJiZGI0YzNjMjlkOWFhBjsAVEkiEF9jc3JmX3Rva2VuBjsARkkiMUVRU1gzZkhvcHRockpaWndWY2NRcGk3SElJczBmOEY3TW50YjJRZ0plSTg9BjsARg%3D%3D--572416e3b12cc85dda3675c22d117839535e636d; path=/; HttpOnly
  X-Runtime: 0.017811
  Date: Fri, 03 Feb 2012 16:26:04 GMT
  X-Rack-Cache: miss
  Server: nginx/1.0.10 + Phusion Passenger 3.0.11 (mod_rails/mod_rack)