Previously I was running the latest 2010 edition of RadControls and had the background color of my TreeViews set to 191 | 219 | 254. However after updating to Q1 2011, not matter what I set the color to it always shows as white. I am not sure if this is a bug or if something changed internally.
the RadTreeView has been revamped to now follow the TPF (Telerik Presentation Framework) amongst other things,
You can set the back colour of the RadTreeView in teh following way: