I just installed ASP.Net MVC 4 RC to replace ASP.Net MVC 4 beta. When trying to run an existing application I\'m getting an error message that AntiForgeryToken has
AntiForgeryToken
Setting the salt parameter is unnecessary and didn't provide any additional protection, so we removed support for it.
Please see my response at How to choose a salt value for ValidateAntiForgeryToken for more information.