I'm using Classic ASP and a bit of AJAX to post the contents of a form back to the page on which the AJAX form lives. Upon AJAX POST the page saves one of those fields (email, to be specific) into a Session variable. The user then goes about their business – perhaps requesting the page again via normal HTTP.
However, this leaves my browser (Firefox 3.0.6) with TWO ASPSESSIONxxxx cookies – I assume one for the AJAX request and one for the standard HTTP call.
This causes the page (which relies upon the Session var) to select either ASP Session ID at random from the two that have been created – one with the Session var set and one without.
I've dealt with this before in PHP and Flash, and you can SET the Session ID in PHP, but not in ASP.