[Dovecot] "Filename keeps changing" issue

[Paul Ezvan]

Hello,

I have been experiencing a issue for a while with dovecot 1.2.8 : 

Dec  4 12:54:00 gen1 dovecot: IMAP(paul):
maildir_file_do(/home/paul/Maildir/.Travail.Linux.Arch
Linux/cur/1224250603.M73770P8724.gen0:2,): Filename keeps changing
Dec  4 12:54:01 gen1 dovecot: IMAP(paul): Disconnected: Internal error
occurred. Refer to server log for more information. [2009-12-04
12:53:59] bytes=4445/26986

So I can't get the messages in this directory neither with Evolution
neither with Horde neither with Squirrelmail, but it works with
roundcubemail.

How can I debug this ?

dovecot -n
# 1.2.8: /etc/dovecot/dovecot.conf
# OS: Linux 2.6.31-ARCH i686  
protocols: imap imaps pop3 pop3s managesieve
ssl_cert_file: /etc/ssl/certs/ezvan.fr.pem
ssl_key_file: /etc/ssl/private/ezvan.fr.key
login_dir: /var/run/dovecot/login
login_executable(default): /usr/lib/dovecot/imap-login
login_executable(imap): /usr/lib/dovecot/imap-login
login_executable(pop3): /usr/lib/dovecot/pop3-login
login_executable(managesieve): /usr/lib/dovecot/managesieve-login
login_process_per_connection: no
mail_location: maildir:~/Maildir
mail_executable(default): /usr/lib/dovecot/imap
mail_executable(imap): /usr/lib/dovecot/imap
mail_executable(pop3): /usr/lib/dovecot/pop3
mail_executable(managesieve): /usr/lib/dovecot/managesieve
mail_process_size: 0
mail_plugin_dir(default): /usr/lib/dovecot/modules/imap
mail_plugin_dir(imap): /usr/lib/dovecot/modules/imap
mail_plugin_dir(pop3): /usr/lib/dovecot/pop3
mail_plugin_dir(managesieve): /usr/lib/dovecot/modules/managesieve
imap_client_workarounds(default): outlook-idle
imap_client_workarounds(imap): outlook-idle
imap_client_workarounds(pop3): 
imap_client_workarounds(managesieve): 
lda:
  postmaster_address: postmaster at ezvan.fr
  mail_plugins: sieve
  sieve_global_path: /var/sieve/global
auth default:
  passdb:
    driver: pam
  userdb:
    driver: passwd
  socket:
    type: listen
    client:
      path: /var/run/dovecot/auth-client
      mode: 432
    master:
      path: /var/run/dovecot/auth-master
      mode: 384
plugin:
  sieve: ~/.dovecot.sieve
  sieve_storage: ~/sieve


Thanks for help !

Paul Ezvan