[Dovecot] Problem with quota in maildir++

[Antonio Casado Rodríguez]

Hi all. I have a problem with one user. His quota is upper of real quota.

# cd /var/mail/problemuser/
# find . -name 'dovecot*' -exec rm -f {} \;
# find . -name 'maildir*' -exec rm -f {} \;
# echo test | mail problemuser -s test

# more maildirsize
104857600S
104215602 1439
647 1

# du -h
4,0K    ./.Borrador/new
4,0K    ./.Borrador/cur
4,0K    ./.Borrador/tmp
16K     ./.Borrador
4,0K    ./.Elementos enviados/new
6,7M    ./.Elementos enviados/cur
4,0K    ./.Elementos enviados/tmp
6,7M    ./.Elementos enviados
44K     ./new
32K     ./cur
4,0K    ./tmp
4,0K    ./sieve/tmp
12K     ./sieve
4,0K    ./.null/new
948K    ./.null/cur
4,0K    ./.null/tmp
960K    ./.null
8,0K    ./home
4,0K    ./.Deleted Items/new
13M     ./.Deleted Items/cur
88K     ./.Deleted Items/tmp
13M     ./.Deleted Items
4,0K    ./.Junk E-mail/new
372K    ./.Junk E-mail/cur
4,0K    ./.Junk E-mail/tmp
384K    ./.Junk E-mail
21M     .

Does anyone know what can happen?
Thanks you.

# dovecot -n
# 1.1.18: /etc/dovecot.conf
# OS: Linux 2.6.9-89.0.11.ELsmp i686 Red Hat Enterprise Linux AS release 
4 (Nahant Update 8) ext3
log_path: /var/log/dovecot/dovecot.log
info_log_path: /var/log/dovecot/dovecot.info
protocols: imaps managesieve
ssl_cert_file: /etc/httpd/conf/ssl.crt/server.crt
ssl_key_file: /etc/httpd/conf/ssl.key/server.key
login_dir: /var/run/dovecot/login
login_executable(default): /usr/libexec/dovecot/imap-login
login_executable(imap): /usr/libexec/dovecot/imap-login
login_executable(managesieve): /usr/local/libexec/dovecot/managesieve-login
login_log_format_elements: user=<%u> method=%m rip=%r rport=%b lip=%l 
lport=%a %c
verbose_proctitle: yes
mail_location: maildir:/var/spool/mail/%n
mail_executable(default): /usr/sbin/post-login-dovecot
mail_executable(imap): /usr/sbin/post-login-dovecot
mail_executable(managesieve): /usr/local/libexec/dovecot/managesieve
mail_plugins(default): quota imap_quota
mail_plugins(imap): quota imap_quota
mail_plugins(managesieve):
mail_plugin_dir(default): /usr/lib/dovecot/imap
mail_plugin_dir(imap): /usr/lib/dovecot/imap
mail_plugin_dir(managesieve): /usr/lib/dovecot/managesieve
sieve_storage(default):
sieve_storage(imap):
sieve_storage(managesieve): ~/sieve
sieve(default):
sieve(imap):
sieve(managesieve): ~/.dovecot.sieve
namespace:
  type: private
  separator: /
  location: maildir:/var/mail/%n
  inbox: yes
  list: yes
  subscriptions: yes
lda:
  postmaster_address: postmaster at ual.es
  mail_plugins: quota cmusieve
  log_path: /var/log/dovecot/dovecot-deliver.log
  info_log_path: /var/log/dovecot/dovecot-deliver.log
auth default:
  master_user_separator: *
  passdb:
    driver: passwd-file
    args: /etc/passwd.masterusers
    master: yes
  passdb:
    driver: pam
  userdb:
    driver: passwd
plugin:
  quota: maildir
  quota_rule: *:storage=100M
  quota_rule2: Trash:storage=15M