From the .spec:

%preun
if [ $1 = 0 ];
then
   /etc/rc.d/init.d/httpd stop > /dev/null
2>&1
   /sbin/chkconfig --del
httpd
   /bin/rm -fr
/var/log/httpd/*
fi

Log-files are valueable data and must be handled with care - and especially
not removed!

Please _never_ do a "rm -f" on _anything_, especially not with -r or *!

The "no-new-rpms" fix: tell people to use --noscripts when
removing/upgrading.

The "new-rpms" fix is obvious.

Regards