version 1.0.rc15 (Newest Version available in Debian 4.0, newer version in testing tree requires new version libc...)

I got a procmail rule that moves mail from some senders to another folder, e.g. .archive.facebook/ . This works fine, the message appear in .archive.facebook/new if i "ls" that directory by shell. But dovecot.index files don't get updated, hence IDLE doesn't tell the client new mail arrived. this only happens if i click on the folder in thunderbird. like this, not even clicking on Thunderbird "Check mail" button shows me new Mail arrived.

Is this a common error in this version? would there any benefit if i self compiled a newer version regarding this issue?

Thanx

Config: log_timestamp: %Y-%m-%d %H:%M:%S ssl_listen: * login_dir: /var/run/dovecot/login login_executable: /usr/lib/dovecot/imap-login mail_extra_groups: mail mail_location: maildir:~/Maildir auth default: mechanisms: plain login passdb: driver: pam userdb: driver: passwd socket: type: listen client: path: /var/spool/postfix/private/auth mode: 432 user: postfix group: postfix master: