Wether I am using Apache 1.3 with mod_auth_ldap 1.6.0 (from Rudedog) or Apache 2.0 with the distributed auth_ldap module (which is, as I understand, based on the rudedog module), I am experiencing the same problems.
BTW, when you reply to a post on some topic and then change the subject, in many mail clients your post will appear in the thread of that old topic. That seems to be the case with this new thread.