[Exim] Exim-4.24 seg fault

Hi Exim people, I'm setting up Exim 4.24 to use mysql for user
autentication, maildir as mailboxes format and SpamAssassin. I've
already set it up in others servers without problems , but this time
I've found a segfault and I cannot figure out what is going on.

Receiving e-mail works fine, but when exim tries to proccess the queue
the following happens, for example:

root@server03:/usr/src/exim-4.24# /usr/local/exim/bin/exim -d -d=0xfbbd5cfd -Mc 1ACmQT-0002lZ-AD
10656 Exim version 4.24 uid=0 gid=0 pid=10656 D=fbbd5cfd
Berkeley DB: Sleepycat Software: Berkeley DB 4.1.25: (December 19, 2002)
Support for: iconv()
Authenticators: cram_md5 plaintext
Routers: accept dnslookup ipliteral manualroute queryprogram redirect
Transports: appendfile/maildir autoreply pipe smtp
Fixed never_users: 0
10656 changed uid/gid: forcing real = effective
10656 uid=0 gid=0 pid=10656
10656 auxiliary group list: <none>
10656 configuration file is /etc/exim.conf
10656 log selector = 040d99d8
10656 trusted user
10656 admin user
10656 skipping ACL configuration - not needed
10656 set_process_info: 10656 delivering specified messages
10656 set_process_info: 10656 delivering 1ACmQT-0002lZ-AD
10656 reading spool file 1ACmQT-0002lZ-AD-H
10656 user=root uid=0 gid=0 sender=andre.correa@???
10656 sender_fullhost = sp.200_xxx_x_xxx.xxxxx.com.br (pobox.com) [xxx.xxx.x.xxx]
10656 sender_rcvhost = sp.xxx_xxx_x_xxx.xxxxx.com.br ([xxx.xxx.x.xxx] helo=yyyyy.com)
10656 sender_local=0 ident=unset
10656 Non-recipients:
10656 Empty Tree
10656 ---- End of tree ----
10656 recipients_count=1
10656 body_linecount=1 message_linecount=8
10656 Delivery address list:
10656 someone@???
10656 locking /var/spool/exim/db/retry.lockfile
10656 locked /var/spool/exim/db/retry.lockfile
Segmentation fault

and e-mail never leaves input folder.

I've thought that it would be a problem with exim being linked to the
wrong libdb, so I recompiled it and now it is using the lastest
Sleepycat Software: Berkeley DB 4.1.25. Maildir folders have being
created and permissions granted, no other error messages logged.

Is there anyone who can give me some advice on the way to go?

tks in advance...

André
andre.correa@???