I'm unable to get the sample site to render its product page. ProductTabs.ascx is throwing this error:

"ASP.NET runtime error: The base class includes the field 'UpdatePnlProductDetails', but its type (System.Web.UI.UpdatePanel) is not compatible with the type of control (System.Web.UI.UpdatePanel). C:\...\WebRoot\Themes\Default\Product\ProductTabs.ascx"

According to the following articles...

http://support.microsoft.com/kb/919284/
http://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?Fee...

...this is some kind of circular reference having to do with how the pages are compiled.

I've followed the posted web.config workaround to no avail.
I dont see any circular references, though I'm not clear on what kind of references they're talking about.
and I've tried moving the page bases into same folder as its controls.

We're running a web app target .Net 3.5 with the Znode library projects left targeting .Net 2.0

I'm just hoping that someone has come across this issue in a Znode context.