Hi, i've upgrade dovecot 1.0.10 to 1.1.3 in Red Hat Enterprise Linux AS release 4 I've installed http://dl.atrpms.net/all/dovecot-1.1.3-0_80.src.rpm with http://www.rename-it.nl/dovecot/1.1/dovecot-1.1.3-managesieve-0.10.3.diff.gz patch. And i've installed dovecot-sieve-1.1.5-8.el4.i386.rpm and dovecot-1.1-managesieve-0.10.3.tar.gz I see in dovecot.log: dovecot: Sep 19 12:20:56 Error: auth(default): dlopen(/usr/lib/dovecot/auth/libauthdb_ldap.so) failed: /usr/lib/dovecot/auth/libauthdb_ldap.so: undefined symbol: null_settings_section_callback dovecot: Sep 19 12:20:56 Error: auth-worker(default): dlopen(/usr/lib/dovecot/auth/libauthdb_ldap.so) failed: /usr/lib/dovecot/auth/libauthdb_ldap.so: undefined symbol: null_settings_section_callback # dovecot -n # 1.1.3: /etc/dovecot.conf 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 auth default: passdb: driver: pam userdb: driver: passwd plugin: quota: maildir quota_rule: *:storage=50M quota_rule2: Trash:storage=15M