My girlfriend just got a new Macbook. And I'm confused. See I've got one of the older macbooks, before the whole unibody stuff. And I remember them having aluminum unibody macbooks, and they looked real beautiful, then for some reason, they ended up changing them to polycarbonate unibodies? Well she ordered an orange Speck case for it, but it's for the old macbook. Now I'm trying to help her find the correct case, and all Amazon lists are aluminum unibody cases. Of the recently released macbooks, the unibody poly and the unibody aluminium, are they the same external dimensions?