Is there a list of controls whose markup was updated to be more standards-compliant in ASP.NET 4.0?
Misspellings in exception messages for the ASP.NET 4.0 Beta 2 Wizard control highlighted below:
A header placeholder must be specified on Wizard 'Wizard1' when HeaderTemplate is set. Specify a
placholder by setting a control's ID property to "headerPlaceholder". The placeholder control must also specify runat="server".
A sidebar placeholder must be specified on Wizard 'Wizard1' when DisplaySideBar is set to true. Specify a
placholder by setting a control's ID property to "sideBarPlaceholder". The placeholder control must also specify runat="server".