The only place this can be reproduced is on the task board. If you are seeing this on any other screens, please let us know. I have logged this as a bug. As a workaround, instead of double clicking on the title bar or using the maximize button, just stretch the window by using the edges or corners of the window.
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!