Rendering ASP.NET Validators And Validation Summary Property As HTML Attributeshttp://msmvps.com/blogs/paulomorgado/archive/2008/05/13/rendering-asp-net-validators-and-validation-summary-property-as-html-attributes.aspxYesterday I blogged about the cause of ASP.NET validators and validation summary slowness . At that point I wasn't aware of the existence of the XHTML conformance configuration (thanks Nuno ). With the XHTML conformance configuration set to LegacyenCommunityServer 2008.5 SP2 (Build: 40407.4157)