Dovecot Assertion on mail server with POP3 and LDAP authentication

[Tim Alberts]

Running two Fedora 6 systems with all the latest updates as of a couple 
days ago at least.  One system is the mail server (sendmail, dovecot), 
the other is the master (open)LDAP server with the mail server running a 
slave LDAP instance.

The problem I'm having is the client pop3 users are frequently being 
told their passwords aren't correct by their email clients (Outlook, 
Eudora).  They try again, a couple times and eventually it works.  I've 
seen it on my own account and when I test their accounts, occasionally 
it just doesn't take the password.  I've only had this trouble since I 
implemented the LDAP authentication.

Checking through the server maillog, I see the following entry:

Apr  4 08:44:38 msi2 dovecot: auth(default): dovecot-auth: ../../../libraries/liblber/io.c:491: ber_get_next: Assertion `ber->ber_buf == ((void *)0)' failed.
Apr  4 08:44:38 msi2 dovecot: auth(default): pam(secretuser,192.168.0.200): Child process died
Apr  4 08:44:38 msi2 dovecot: auth(default): PAM: Child 14564 died with signal 6
Apr  4 08:44:38 msi2 dovecot: pop3-login: Aborted login: user=<secretuser>, method=PLAIN, rip=192.168.0.200, lip=192.168.0.11


This seems to point out that dovecot is the problem, but again, I didn't 
have this trouble until I implemented the LDAP authentication.  So my 
question is, anyone know a solution?  If not, anyone got a suggestion of 
where I should look for more clues or support?  Or any suggestions at all?

Thanks for any help.