The exception means that a Setter from a Style is unable to be applied somewhere along the way. Are you using any styles in your project? Also, which assemblies are you using - version 0712 or any of the LIBs?
If you are unable to detect the problem, please send us a reproducable sample which we can test.
All the best,
the Telerik team
Explore the entire Telerik portfolio by downloading the Ultimate Collection trial package. Get now >>