[Dovecot] quota error dovecot 1.1.13

[Brightblade]

Hi all,

I've troubles with dovecot and quota. Sometimes mails to users are bounced because quota is full. I'm reading quota_rules from LDAP. One "du -h ." from maildir show user is under quota ( at 70 % more or less), less than 99%, i delete maildirsize and dovecot recreate it with ldap-quota value at first line and second line is current-quota mails. Current-quota is near quota max value so dovecot execute quota_warning (99%).
Why is dovecot thinking quota is at 99% when du -h show me its value is near 70% ? any guess?

My conf:

syslog_facility: local1
protocols: imap pop3 managesieve
listen(default): *
listen(imap): *
listen(pop3): *:110
listen(managesieve): *:2000
ssl_disable: yes
disable_plaintext_auth: no
login_dir: /usr/local/dovecot//var/run/dovecot/login
login_executable(default): /usr/local/dovecot/libexec/dovecot/imap-login
login_executable(imap): /usr/local/dovecot/libexec/dovecot/imap-login
login_executable(pop3): /usr/local/dovecot/libexec/dovecot/pop3-login
login_executable(managesieve): /usr/local/dovecot/libexec/dovecot/managesieve-login
login_process_per_connection: no
login_process_size: 1200
login_processes_count: 20
login_max_processes_count: 2048
login_max_connections: 512
max_mail_processes: 4096
mail_max_userip_connections(default): 1000
mail_max_userip_connections(imap): 1000
mail_max_userip_connections(pop3): 10
mail_max_userip_connections(managesieve): 10
mail_location: maildir:%h/Maildir
mmap_disable: yes
dotlock_use_excl: no
mail_nfs_storage: yes
mail_nfs_index: yes
mail_executable(default): /usr/local/dovecot/libexec/dovecot/imap
mail_executable(imap): /usr/local/dovecot/libexec/dovecot/imap
mail_executable(pop3): /usr/local/dovecot/libexec/dovecot/pop3
mail_executable(managesieve): /usr/local/dovecot/libexec/dovecot/managesieve
mail_plugins(default): quota imap_quota
mail_plugins(imap): quota imap_quota
mail_plugins(pop3): quota
mail_plugins(managesieve):
mail_plugin_dir(default): /usr/local/dovecot/lib/dovecot/imap
mail_plugin_dir(imap): /usr/local/dovecot/lib/dovecot/imap
mail_plugin_dir(pop3): /usr/local/dovecot/lib/dovecot/pop3
mail_plugin_dir(managesieve): /usr/local/dovecot//lib/dovecot/managesieve
imap_client_workarounds(default): outlook-idle
imap_client_workarounds(imap): outlook-idle
imap_client_workarounds(pop3):
imap_client_workarounds(managesieve):
sieve(default):
sieve(imap):
sieve(pop3):
sieve(managesieve): ~/.dovecot.sieve
auth default:
  cache_size: 512000
  cache_ttl: 1800
  executable: /usr/local/dovecot/libexec/dovecot/dovecot-auth
  failure_delay: 5
  debug: yes
  worker_max_count: 4096
  worker_max_request_count: 4096
  process_size: 4096
  passdb:
    driver: ldap
    args: /etc/dovecot/dovecot-ldap.conf
  userdb:
    driver: ldap
    args: /etc/dovecot/dovecot-ldap.conf
  socket:
    type: listen
    master:
      path: /var/run/dovecot/auth-master
      mode: 511
plugin:
  sieve: %h/.dovecot.sieve
  quota_warning: storage=99%% /usr/local/bin/quota-full.sh %u
  quota_warning2: storage=95%% /usr/local/bin/quota-warning.sh 95 %u
  quota_warning3: storage=70%% /usr/local/bin/quota-warning.sh 70 %u
  quota: maildir



thanks in advance, 

Regards.