I currently use custom error codes when something goes wrong with my Jquery Ajax calls.
Does this new security issue mean I have to stop using this method for passing information back to my app.
http://weblogs.asp.net/scottgu/archive/2010/09/18/important-asp-net-security-vulnerability.aspx
Is it still possible to pass decent error messages, or is it just one fixed error message. Will this ever be truly fixed?
You jQuery Ajax calls probably do not have any encryptions and verifications data to crack.
Yes its possible to pass decent error message but you did not need to give him details for the error code, just tell them that some thinks is going wrong.
Of course this have nothing to do with input validation.