Ok, I see the problem, now. (When I tried earlier, I was confused about what I should be looking for.)
Racket sets the x87 control word to use double precision instead of extended precision. That setting apparently interferes with the pow() C library function. Mac library functions use SSE for floating point, so the x87 control setting wouldn't matter for pow(). _________________________________________________ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/users
