I just gave a quick glance at the new UI and dig some in the code of the new classes. However, one thing I noticed - or failed to find - is if it's possible to make not-rectangle shaped button. I know I can use transparent bitmap, but then how would the input zone be made to fit that shape? I've noticed current button are "clicked" even if you click in a fully transparent zone. Another thing I would like to know, the old UI had really lot of troubles with multi-touch on phone/tablet. Is this issue still in the new GUI?