cyrus-imapd replication configuration options

[Steven Ingram]

Are there any configuration options that cannot be present in the
imapd.conf file when using replication? I am running the CentOS 5.3
version of cyrus-imapd (2.3.7-2.el5_3.2) and receive the error "imap1
sync_client[25737]: connect(sm1.4test.net) failed: Invalid argument"
every time I attempt a manual sync. While I believe that this version
has a bug that prevents replication, I want to make sure I don't have
extraneous options in my imapd.conf file that could be causing this
error before I submit a bug report.

imapd.conf:

configdirectory: /var/lib/imap
partition-default: /var/spool/imap
admins: cyrus
lmtp_admins: lmtp
altnamespace: yes
sievedir: /var/lib/imap/sieve
sendmail: /usr/sbin/sendmail
autocreateinboxfolders: Sent|Trash|Drafts|Junk
autocreatequota: 1048576
hashimapspool: true
sasl_pwcheck_method: saslauthd
sasl_mech_list: PLAIN
sasl_minimum_layer: 0
allowplaintext: 0
tls_cert_file: /etc/pki/cyrus-imapd/imap1.4test.net.crt
tls_key_file: /etc/pki/cyrus-imapd/imap1.4test.net.key
tls_ca_file: /etc/pki/cyrus-imapd/ca-bundle.crt
tls_require_cert: 0
virtdomains: on
defaultdomain: 4test.net
lmtp_downcase_rcpt: true
sync_host: sm1.4test.net
sync_authname: cyrus
sync_realm: 4test.net
sync_password: secret
sync_log: 1