What I want: my Magic Trackpad to do “natural” (i.e. reversed) scrolling while my new mouse does “traditional” (i.e. down-is-down) scrolling.
What Apple gives me: two dialog options that appear to allow me to do exactly what I want. One is in the “Mouse” section of System Preferences; the other in the “Trackpad” section.
Why this doesn’t work: when you select one checkbox, the other one changes. Despite being two checkboxes in different parts of the UI, they appear to reflect the same behind-the-scenes value.
I deem this to be shit. It’s downright crap to have one value over here changing the value of something else over there. Why even have two checkboxes to present one value? Nothing but user confusion can result. Isn’t Apple supposed to be really really good at not confusing the users? At being logical and consistent and well thought out?
Update: Pilotmoon’s Scrollreverser is a piece of freeware that solves this problem neatly and effortlessly (although it does introduce another icon into your menu bar, if you’re bothered by that sort of thing, and it also disables the three-finger-tap to bring up the Dictionary app. Sadface.) I still think Apple’s dialog is shite, though.