I am using a custom form to get around the url-rewriting bug and the page runs fine on asp.net. However when I try to switch to design mode I get a nasty little greyed-out box instead of my controls, which says:
Error Creating Control - form1
Unable to cast object of type 'System.Web.UI.Design.HtmlIntrinsicControlDesigner' to type 'System.Web.UI.Design.ControlDesigner'.
Is there a solution to this problem? I am using VS 2005 SP1 on Vista with asp.net 2.0 and C#.