Hello, we're evaluation the new controls for WPF 4.0, and I found a bug that is sort of a show stopper. Basically, when resizing a window vertically, the items get cropped. See this video here:

http://www.screencast.com/users/CarloDekstop/folders/Jing/media/8f5140af-f272-4a36-ad2c-b16b8d5ceb1b

The main reason we're evaluating this control is because we need solid virtualization functionallity. We've tried other tree views and virtualization always turns to be really buggy. Is there any heads up you can give us on this? Any known or yet to solve issues?

Thanks.