I'm having a bit of trouble with the Windows Live Authentication API. Everything runs smoothly for logging in, but when I log out (i.e. navigate to http://login.live.com/logout.srf?appid=my_app_id I am logged out and redirected to msn.com. I've had this problem before, and the cause seemed to be related to cookie issues. I reorganized some things, and now this aspect is broken. I modified the action for "logout" in the authentication handler provided to write a response instead of redirect, and it seems that the browser never even loads this page... I know the "clearcookie" action completes successfully, because when I commented the GIF response part out (as a test) Windows Live complained.
Does anyone have an idea what might be wrong?