Notebook gestures or functional hotkeys (like volume control) may not work on separate desktops (I don't mean ReHIPS isolated desktops here, any desktops, e.g. Desktops program from former Sysinternals creates several desktops) or sometimes even on the main desktop for isolated programs. On low-level the process responsible for gestures handling intercepts gestures and sends respective combination of keys to the foreground window. But it doesn't work on separate desktops as this process knows nothing of them, I guess it wasn't designed to handle them at all. Our attempts to contact developers led to nothing.