Barton's %piargs change seems to mask any difference. I think if wxmaxima
adds properties at runtime, it should add them in such a way as to not
interfere with the simplifier. Apparently it won't show up in "integrated"
tests, since adding 46 memory references to each call to simp-%sin is not a
big deal, considering the total cost of simp-%sin. Still, it is a pointless
computation, easily removed; a computation that WAS removed in an earlier
version of maxima.
RJF