Dave, how does embedding help when ad_conn url will still return incorrectly? Eduardo's links identify the hack that detects the subsite "root" of the URL and handles GETs but not POSTs.
What if the page I am posting to is a lib file inside acs-subsite? I can't very well embed acs-subsite inside (as in my case) a package that extends it.
I don't see getting the proper URL as unique behaviour.
Calling ad_conn url while in http://mapped_host/
should return "/" not /subsite/
