Alt+mouse wheel to zoom: client window "sometimes" receives mouse-wheel events
I often use alt+mousewheel to zoom the screen, very useful feature. The only problem is that if the mouse is over a window (which it normally is, ie. the one i want to show/see closer) then that window receives the mouse up/down events, while it shouldn't since those are meant by the user to tell xfwm to zoom the screen, not to scroll around in the app or do whatever the mouse wheel happens to do in that window.
edit: this happens inconsistently and "sometimes" only, no idea what triggers it.