I’m running Windows 7 Home Premium. When I maximize the Scrivener window it leaves the bottom half-inch under my toolbar. The toolbar is in its default position at the bottom of my screen (1440x900, if that matters). One can set it to only appear when the mouse pointer comes near. Anyway, standard Windows behavior would have the the bottom of the maximized application window flush with the top of the toolbar.
Thanks and good luck. Everything I’ve seen of Scrivener so far is impressive and I’ll definitely buy the Windows version when you offer it for sale.