This is actually a know issue and has been already logged into our Public Issue Tracking System. You may follow its progress here. For the time being you may predefine the template of the GridViewFooterRow as demonstrated in the attached project.
All the best,
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!