OK guys, there has to be an answer for this, but I keep running into dead ends... Page on domain A has an iFrame that contains a page from domain B. In IE 8, cookies from domain B are blocked when viewing page on A. ("Third party content"). I'm thinking there has to be a way that AJAX can work around this, but I'm still stuck. I don't have access to domain B, so a P3P policy is not an option. How can I get the cookies from domain B delivered on IE 8? Any ideas here?