I reinstalled OS X from a Leopard dvd earlier (took it to an apple store and borrowed their superdrive), then transferred my info from my black macbook (latest revision, so has the volume keys as F10,F11,F12, play at F8 etc) via time machine. Once that had finished, I logged in on the air and tried to lower the brightness. It wouldn't work, so i tried the other F keys and they don't perform their functions. The F12 key for example brings up dashboard, F9 and 10 are expose. Does anyone know why this could be?