Strange ssl certificate checking issue

Hello list.

That's not really an openldap issue, but I guess its developper knows 
openssl behaviour better then myself: how could a simple 
distribution-provided update of root certificates affect the way 
openldap uses my own root certificate ?

Before the update, the root certificate is correctly read from 
/etc/pki/tls/rootcerts, as per openldap configuration (TLS_CACERTDIR 
variable). After the update, the root certificate is still read, but 
ignored, then looked for again in /etc/pki/tls/certs, triggering a 
failure if not also present/symlinked from there.

The only file change affecting the tool between the two scenarios, 
according to strace, is /etc/pki/tls/cert.pem, which doesn't contains 
anything useful in my case. May a syntax error, or a too large size, 
triggers side-effects ?

Full traces available at
https://qa.mandriva.com/show_bug.cgi?id=57512
-- 
BOFH excuse #61:

not approved by the FCC