Read what I could find on possible upgrade issues and saw only one that might be a problem. I don't think it will but figured it was worth checking.
Anything jump out at the more experienced users?
dovecot -n (edited to protect the guilty. ie. me) attached.
# 1.1.11: /etc/dovecot.conf # OS: Linux 2.6.22.19-vs2.3.0.34.1 i686 CentOS release 5.2 (Final) log_path: /var/log/dovecot/dovecot.log info_log_path: /var/log/dovecot/dovecot-info.log protocols: imap imaps listen: *:143 ssl_listen: *:993 login_dir: /var/run/dovecot/login login_executable: /usr/libexec/dovecot/imap-login login_greeting_capability: yes valid_chroot_dirs: /var/mail first_valid_uid: 5000 last_valid_uid: 5000 first_valid_gid: 5000 last_valid_gid: 5000 mail_access_groups: mail mail_location: maildir:~/Maildir mail_debug: yes maildir_copy_preserve_filename: yes imap_client_workarounds: outlook-idle auth default: mechanisms: plain login CRAM-MD5 default_realm: example.com master_user_separator: * verbose: yes debug: yes debug_passwords: yes passdb: driver: passwd-file args: /var/mail/vhosts/%d/passwd.masterusers pass: yes master: yes passdb: driver: passwd-file args: username_format=%n /var/mail/vhosts/%d/passwd userdb: driver: passwd-file args: username_format=%n /var/mail/vhosts/%d/passwd socket: type: listen master: path: /var/run/dovecot/auth-master mode: 432 user: vmail socket: type: listen client: path: /var/spool/postfix/private/auth mode: 432 user: postfix plugin: sieve: /var/mail/vhosts/%d/%n/dovecot.sieve