Problem with chrooted user, manage-sieve plugin, lmtp and Thunderbird manage sieve extension: wrong symbolic link to active script

I'm not sure, is it dovecot-managesieve plugin or Thunderbird extension.

I have virtual users which are "chrooted" to their Maildirs, like this:

user_query = SELECT '/usr/home/hosted/v-mail/%d/%n' AS chroot,
'/' AS home, 'maildir:~/' AS mail, email.uid AS uid, email.gid AS gid FROM
<snipped>

It works perfectly.

I'm using sieve and manage-sieve plugins for dovecot. .dovecot.sieve link is relative, like this:

v-mail@onlyone:~/serebryakov.spb.ru/lev # ls -l .dovecot.sieve lrwxr-xr-x 1 root v-mail 17 Feb 4 18:19 .dovecot.sieve -> sieve/TOTAL.sieve

It works. But when I deactivate/activate script via Manage sieve extension in Thunderbird link becomes absolute (with respect to chroot):

v-mail@onlyone:~/serebryakov.spb.ru/lev # ls -l .dovecot.sieve lrwxr-xr-x 1 root v-mail 17 Feb 4 18:19 .dovecot.sieve -> /sieve/TOTAL.sieve

and delivery agent (LMTP) start to complain:

v-mail@onlyone:~/serebryakov.spb.ru/lev # grep .dovecot.sieve /var/log/dovecot.log Feb 04 18:18:42 lmtp(lev@serebryakov.spb.ru)<36054><iPQqEtJD/WHWjAAAlMIKZw>: Warning: sieve: file storage: Active sieve script symlink /usr/home/hosted/v-mail/serebryakov.spb.ru/lev/.dovecot.sieve is broken: Invalid/unknown path to storage (points to /sieve).

I'm not sure, is it problem of manage-sieve plugin, lmtp sieve plugin or Thunderbird Sieve extension...

-- // Black Lion AKA Lev Serebryakov