http://encosia.com/index.php/2007/07/11/why-aspnet-ajax-updatepanels-are-dangerous/

http://encosia.com/index.php/2007/07/18/how-to-improve-aspnet-ajax-error-handling/

http://encosia.com/index.php/2007/07/13/easily-refresh-an-updatepanel-using-javascript/

http://weblogs.asp.net/scottgu/archive/2006/10/29/Tip_2F00_Trick_3A00_-Handling-Errors-with-the-UpdatePanel-control-using-ASP.NET-AJAX.aspx

http://msmvps.com/blogs/luisabreu/archive/2006/10/29/UpdatePanel_3A00_-having-fun-with-errors.aspx