For some reason with cookieless session enabled in MVC2, the session id in the query string is reset with every form post that happens. Is there a special route that needs t
Microsoft Security Bulletin MS10-070 - Important: Vulnerability in ASP.NET Could Allow Information Disclosure (2418042)
If installed this update, check this KB.
Http.sys registry settings for IIS
Use cookieless session & form authentication auto insert this("/(S(...)F(...))/") Url path segment. Default UrlSegmentMaxLength is 260, but MS10-070 installed environment over this.I think it is a result for padding oracle.
Hope this help!