Well... I pretty much broke alot on my blog while testing...
Anyway, I'm taking this chance to write about what I've seen about the design of the now old leak.
These are the two types of display that can be seen. Left is Aero and right is Basic and XP. Looking at the Aero version, the window isn't hold by a hideable frame. Instead, the frame is the edge of everything. Next we look at the right, Aero-less windows look just like it did before, with a hidden frame. Just as my printscreen detected, it works just like it did in 8.5.
This shows how WPF is being implemented. I know, nothing fancy and not even close to what Yahoo! Messenger did. But I do know that it feels more stable while in Aero (specially while dragging). This piece of coding that was added has a big potential... But how much is used is up to the developers.
Now, to try to get rid of the "undefined" text and the ad from here!