ASP.net 2.0 ValidateRequest Security Vulnerability

I’ve just heard that the ASP.net 2.0 ValidateRequest feature has a security vulnerability.  Very interesting weakness this.  If you don’t know about the ValidateRequest feature, its an “on by default” feature to protect ASP.net applications from Cross-Site Scripting attacks by making sure the input field doesn’t contain anything potentially dangerous.  For example, entering