Ok so here is a fun little problem. I really love the NestedViewTemplate feature in the RadGrid, and after a bit of fighting to get my RadGrid to populate with data inside a RadPanelBar, I am getting a JavaScript error when trying to access the NestedView.
Sys.WebForms.PageRequestManagerServerErrorException: An unknown error occurred while processing the request on the server. The status code returned from the server was: 12029
Sys.WebForms.PageRequestManagerServerErrorException: An unknown error occurred while processing the request on the server. The status code returned from the server was: 12029