We have a problem with the versions we are using RadControls for development:
Sitefinity uses 2010.3.1109.40 version, but instead the system uses the latest version 2011.1.315.40.
If you try to upgrade the project to the latest version, Sitefinity stops working...
If you use the 2010.3.1109.40, Visual Studio tries to use the other and produces errors at design time.
How we can make it work?