Currently, we are refactoring our RadTreeView implementing many improvements in the data and UI layers. All themes will be updated and the functionality for the tree view Lines will work properly using the new mechanism of UI rendering. The new version of RadTreeView control will be available in Q1 2011 released in the first half of March.
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!