twitpic.com is doing it right

[root@unitedgamesfactory /]# curl -I twitpic.com HTTP/1.1 200 OK Server: nginxDate: Mon, 04 Jul 2011 22:34:18 GMT Content-Type: text/html Connection: keep-alive X-Powered-By: PHP/5.3.5-1ubuntu7.2 Set-Cookie: twitpic1=16685586e3d3390773cb661364ada513; expires=Sun, 05-Jan-2053 21:08:36 GMT; path=/; domain=.twitpic.com; HttpOnly Expires: Thu, 19 Nov 1981 08:52:00 GMT Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0 Pragma: no-cache