OpenLDAP amd64/i386 weirdness

[O. Hartmann]

Hello,

I made some strange experiences in running OpenLDAP 2.4.11 on both i386 
and amd64 architectures of the most recent FreeBSD 7.0-STABLE.

I already setup and run three servers (fourth is coming soon). Two of 
them are based on FreeBSD amd64, one is based on i386. The do have 
almost the same configuration, the same portrevision of both nss_ldap 
and pam_ldap I need to use (nss_ldap-1.257, pam_ldap-1.8.4), and, of 
course, the same OpenLDAP port 
(openldap-sasl-client-2.4.11,openldap-sasl-server-2.4.11) an the same 
SASL2 libraries taken from port (cyrus-sasl-ldapdb-2.1.22). So, this is 
the base on ALL boxes! Also the changes in /etc/pam.d/system, 
/etc/pam.d/sshd, /etc/pam.d/other and /etc/pam.d/passwd are exactly the 
same.
So, now the weird thing.

On all amd64-boxes I can config /etc/nsswitch.conf this way and it works:

passwd: compat
passwd_compat: ldap
group: compat
group_compat: ldap

The manpages do not reveal anything about 'ldap' is allowed (FreeBSD is 
in this case far behind anything else out the server market, a shame), I 
tried it and had success on all of my amd64-boxes. But using the same on 
the third i386-server fails. And now I'm asking myself what I've done 
magic or wrong or have overseen (a small piece in the chain of 
configurations) or is there indeed a difference between amd64 and i386 
in handling this?

Thanks in advance,
Oliver

P.S. Please respond to my email also, I'm not subscriber of the 
'questions' list. Thank you.