>Hi everyone,
>
>After we moved to VS2008 we're getting errors related to CalendarExtender
>--------------------------------------------------------------------------------
>The control with ID 'CalendarExtender1' requires a ScriptManager on the page. The ScriptManager must appear before any controls that need it.
>Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
>
>Exception Details: System.InvalidOperationException: The control with ID 'CalendarExtender1' requires a ScriptManager on the page. The ScriptManager must appear before any controls that need it.

Just an idea - go into your project references for the ASP.NET app and remove the System.Web.Extensions* files. Then add them back in - make sure the version says "3.5.0.0".