[Dovecot] Problem with dovecot-acl

[dss]

I have a problem with dovecot-acl. Some of our users need to use the same Mailbox with all folders: Inbox (with subfolders), Outbox, Send and Deleted, (some users need in full righs, some - readonly) so I choosed Symlinking mailboxes and tried to use dovecot-acl file.

cat dovecot-acl:
user=t1 lrwsti
user=operolegs lrwsti
user=operantona lrwsti
user=operdss lr

User operdss have lrwsti rights in this shared mailbox unstead of lr! But if I comment out other users in the dovecot-acl:

#user=t1 lrwsti
#user=operolegs lrwsti
#user=operantona lrwsti
user=operdss lr

User operdss have lr rights. Whats wrong?
It seems, that dovecot-acl is working only for one user.
How can I fix it?

===
Here is my configs.

imap:~# dovecot -n
# 1.2.13: /etc/dovecot/dovecot.conf
# OS: Linux 2.6.26-2-686 i686 Debian 5.0.6 
log_timestamp: %Y-%m-%d %H:%M:%S 
disable_plaintext_auth: no
login_dir: /var/run/dovecot/login
login_executable: /usr/lib/dovecot/imap-login
mail_privileged_group: mail
mbox_write_locks: fcntl dotlock
mail_plugins: acl imap_acl
auth default:
  passdb:
    driver: pam
  userdb:
    driver: passwd
plugin:
  acl: vfile

----

imap:~# ls -l /home/t1/Maildir
lrwxrwxrwx 1 root root 21 2010-09-22 16:03 /home/t1/Maildir -> /var/mail/720/Maildir
imap:~# ls -l /home/operolegs/Maildir
lrwxrwxrwx 1 root root 21 2010-09-23 16:00 /home/operolegs/Maildir -> /var/mail/720/Maildir
imap:~# ls -l /home/operantona/Maildir
lrwxrwxrwx 1 root root 21 2010-09-23 16:00 /home/operantona/Maildir -> /var/mail/720/Maildir
imap:~# ls -l /home/operdss/Maildir   
lrwxrwxrwx 1 root root 16 2010-09-28 16:32 /home/operdss/Maildir -> /home/t1/Maildir

---

imap:/home/t1/Maildir# ls -l
total 112
drwxrws--- 2 t1         mshare  4096 2010-09-27 10:46 cur
-rw-rw---- 1 t1         mshare    99 2010-09-29 15:56 dovecot-acl
-rw-rw---- 1 operdss    mshare   312 2010-09-29 16:43 dovecot-acl-list
-rw-rw---- 1 operolegs  mshare  1144 2010-09-24 12:16 dovecot.index
-rw-rw---- 1 t1         mshare 41984 2010-09-28 16:39 dovecot.index.cache
-rw-rw---- 1 t1         mshare 25068 2010-09-28 16:38 dovecot.index.log
-rw-rw---- 1 operantona mshare    17 2010-09-23 16:41 dovecot-keywords
-rw-rw---- 1 operantona mshare  1941 2010-09-27 10:46 dovecot-uidlist
-rw-rw---- 1 t1         mshare     8 2010-09-29 16:43 dovecot-uidvalidity
-rw-rw---- 1 t1         mshare     0 2010-09-22 10:54 dovecot-uidvalidity.4c99a82f
drwxrws--- 2 t1         mshare  4096 2010-09-27 10:46 new
-rw-rw---- 1 operdss    mshare   327 2010-09-29 16:43 subscriptions
drwxrws--- 2 t1         mshare  4096 2010-09-27 10:46 tmp

-----

imap:/home/t1/Maildir# dpkg --list|grep dovecot 
ii  dovecot-common                                           1:1.2.13-1~bpo50+1             secure mail server that supports mbox and maildir mailboxes
ii  dovecot-imapd                                            1:1.2.13-1~bpo50+1             secure IMAP server that supports mbox and maildir mailboxes

dovecot packages - from backports
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Linux: Debian Lenny up2date