Found a funny little f**k-up today- Was driving my Mac F1 on in-car view, and as everyone'd prolly know the speedometer is graduated in both mph and km/h, with the larger outer ring of numbers being miles and the tiny inner ring being kays (darned Brits and their imperialism).
I've set my distance/speed units to metric, yet the cars speedo swings through mph in sync with the kays per on the HUD.
Not so clever now, eh Kaz?