Let me be more specific, just in case our messages are getting crossed...

What should work on all operating systems, and is continuing to work for me, is the non-rectangular windows. For instance, the rounded corners on the skins, and the transparent place where you can see "air" through the gap between the top of the handles and the fascia.

What's not working on my system is the ability for the entire window to be partially translucent, the percentage of translucency being controlled by the new box in the configuration screen.

Is that working for you?