ecl was upgraded but maxima not yet rebuilt to match it,
I belive for at least one week, so there is a problem with
broken dependency of maxima-runtime-ecl that wants
ecl-12.7.1 while rawhide has ecl-12.12.1.
I rebuilt maxima in my computer with updated ecl and
did not notice any problems:
$ repoquery --requires maxima-runtime-ecl | grep ecl
$ rpm -qp --requires RPMS/x86_64/maxima-runtime-ecl-5.29.1-1.fc19.x86_64.rpm |grep ecl
sbcl currently FTBFS on rawhide, which is currently blocking rebuilding maxima.
Perhaps you could try,
in the meantime?
I guess it's not a strict blocker to doing maxima (I'd prefer f18->f19 didn't regress, but oh well),