We have an ASP Classic application When using IE8 the session does not get passed to the child window intermittantly when doing a window.open. This is now happening to many of our Production Customers hosted online and occurs only since upgrading to IE8. We notice that if doing a window open it might work once and then not work 3 times. I.e. the child window keeps the same Session.SessionId and then sometimes it creates a new session. It seems as though there is some sort of corruption in the browswer processes itself. Thanks for help in advance Regards Rob