d) I would note that RedHat's 2.4 build is linked to NSS, which is fairly problematic. See <http://www.openldap.org/lists/openldap-devel/201204/msg00019.html> and <http://www.openldap.org/its/index.cgi/?findid=7367>. I do not know if the LTB project makes this same mistake or not.