I agree with Richard that this is uncommon and not previously reported behavior. Therefore, please follow his suggestion and open a new support ticket with your project in it and detailed steps on how to reproduce this scenario.
the Telerik team
Registration for Q1 2011 What’s New Webinar Week is now open. Mark your calendar for the week starting March 21st and book your seat
for a walk through all the exciting stuff we ship with the new release!