Indeed with the latest release of the controls we implemented various improvements of our controls related to their functionality in touch devices. We already have several bugs that have been reported and our developer team is working on resolving them. Can you please send us a very simplified runnable project that we can test locally and inspect the issue that you have thoroughly? Can you also specify the steps needed for reproducing the behavior that you get?
the Telerik team
If you want to get updates on new releases, tips and tricks and sneak peeks at our product labs directly from the developers working on the RadControls for ASP.NET AJAX, subscribe to their blog feed