actually, arc does use the same namespace, that is most of the cause of this problem. if they were in different namespaces, there would be no problem with variables shadowing built-in functions. you still have to worry about variable capture, but it's a much less significant problem.
note: i'm not saying i don't like the same namespace thing. it actually shortens a great deal of code, and eliminates CL's stupid ass #' garbage.
