"variable capture like this happens maybe in 1/1000 uses of macros (thought it's already happened once to me, so I agree with your concern is valid)"
How did it happen?! Did you skip a uniq out of laziness, or did the lexical environment into which you expanded rebind an Arc keyword or one of your own function names or ____? Maybe lisp-1 necessitates hygiene, and lisp-1 is The Real Problem.
As a longtime very relaxed CLer I must say I completely do not appreciate the naming paranoia I have experience with Arc/Lisp-1. Funcall is precisely what problem? My massive codebase shows 340 defmacros and 201 funcalls, which if you think about it is an astonishing ratio. (Think "define" vs. "invoke".)
