I'm getting:
Warning: ldap_start_tls() [function.ldap-start-tls]: Unable to start TLS: Connect error in /var/www/X.php on line Y
/etc/ldap/ldap.conf:
TLS_CACERT /etc/ssl/certs/ca.crt
ca.crt is the CA which signed the LDAP server certificate. The certificate on the LDAP server is expired and I can't change it.