>>I always use Forms authentication with authentication info in the Session object (standard Forms authentication).
>
>Do you mean you have a co-relation with the Web site member database and the IIS basic authentication? If yes, that is creating a HTTP header if I recall corrrectly.
>
>Otherwise, could you provide more info about the user recognition persistence data travelling across the wire?

Actually I am using cookies (default for asp.net forms authentication). Not sure what dimension I was in for my previous response.