When I open the "window rules" dialog from the context menu of any window title bar, I can no longer add new rules, since the "add property" button is now located _outside_ of the content shown here. The button is only available when I open the "window rules" component via the system settings dialog. The same is true for the "Detect Window Properties" button This is a regression.
*** This bug has been marked as a duplicate of bug 442660 ***