There can be only one:

$ curl -I demo.liftweb.net
HTTP/1.1 200 OK
Server: nginx/0.6.32
Date: Tue, 15 Sep 2009 06:37:32 GMT
Content-Type: text/html; charset=utf-8
Connection: keep-alive
Expires: Thu, 01 Jan 1970 00:00:00 GMT
Set-Cookie: JSESSIONID=4ybw6k5861ab;Path=/
Content-Length: 8061
Expires: Tue, 15 Sep 2009 06:37:32 UTC
Cache-Control: no-cache; private; no-store; must-revalidate; max-
stale=0; post-check=0; pre-check=0; max-age=0
Pragma: no-cache
X-Lift-Version: 1.1-SNAPSHOT