I'm starting this thread since I haven't found any mention of this problem yet (sorry if I'm wrong about that)
I had started developing an app on the leaked sdk, one of the views included a list view (pretty basic), and everything was going fine, but the list just won't display with the official sdk. I also noticed the same thing on the sample app (UIWidget, in the basic list section)

Does anyone know what changed since ?

Thank you in advance