http://blogs.msdn.com/mattgi/archive/2007/05/12/validators-update-available.aspxThe release on Windows Update that contains updates to enable the validator controls to work with the UpdatePanel has been delayed. However, you can download a HotFix that contains the changes. http://connect.microsoft.com/VisualStudio/Downloads/DownloadDetails.aspx?DownloadID=610en-USCommunityServer 2.1 SP1 (Build: 61025.2)http://blogs.msdn.com/mattgi/archive/2007/05/12/validators-update-available.aspx#2600515Sun, 13 May 2007 17:13:40 GMT91d46819-8472-40ad-a661-2c78acb4018c:2600515John Mandia's Points of Interest<p>Wow this week went quickly. On the Silverlight front I&amp;#39;ve managed to watch a few more Mix sessions</p> http://blogs.msdn.com/mattgi/archive/2007/05/12/validators-update-available.aspx#3561355Wed, 27 Jun 2007 11:21:38 GMT91d46819-8472-40ad-a661-2c78acb4018c:3561355idunno.org<p>asp.net validators for ajax, finally, sort of, maybe.</p>