We've got the following set up for our CD control.   It works fine when were run the application.  It's just really annoying in the

developement environment.  If I remove the CD control, the problem goes away.

 

 

tabcontainer(ajax)   with 4 tabs

|

|

|------ UpdatePanel(ajax)

         |

         |

         |------------ CE Control

 

 

This is what we see when flipping from source editor to design editor in VS2005

 

Error Rendering Control - tabContainer

 

An unhandled excpetion has occured

'asp:UpdatePanel' cound not be set on property 'ContentTemplate"