After upgrading to the recently provided rpm of apache-1.3.9-8 I noticed that the suEXEC mechanism was no longer working (and apache no longer mentioned suEXEC on startup). The problem is that /usr/sbin/suexec ought to be set suid but wasn't. By executing chmod 711 /usr/sbin/suexec the problem was resolved.
the suid bit was removed from suexec to provide a safer default security set-up.