replying to a message causes all messages to marked as new

[Robin M.]

When I reply to a message all the existing messages have their flags set
as new. If I reply to a message that I have previously replied to all the
messages are -not- flagged as new, but the message that I replied to is
marked as new. I have tested this behavior using Outlook Express and
Squirrelmail and they bot cause this.

Simon Matters cyrus-imapd-2.2.3-8
Simon Matters cyrus-sasl-2.1.18-1
postfix-2.0.19-2
openldap-2.1.25-5

this is my imapd.conf
<snip>
servername: mail.drafts.com
configdirectory: /var/lib/imap
partition-default: /var/spool/imap
admins: cyrus
sendmail: /usr/sbin/sendmail
hashimapspool: true

sasl_pwcheck_method: saslauthd
sasl_mech_list: PLAIN login
sasl_minimum_layer: 0

lmtp_downcase_rcpt: yes
lmtp_allowplaintext: yes
lmtp_over_quota_perm_failure: no

virtdomains: userid
unixhierarchysep: yes
altnamespace: yes
defaultdomain: localdomain

createonpost: yes
autocreatequota: 20000
autocreateinboxfolders: Sent Items | Drafts | Deleted Items | Junk E-mail
autosubscribeinboxfolders: Sent Items | Drafts | Deleted Items | Junk
E-mail

userprefix: Other Users
sharedprefix: Global Shares
#autosubscribesharedfolders:
sievedir: /var/lib/imap/sieve
autosievefolders: Junk E-mail
sieve_maxscriptsize: 32
sieve_maxscripts: 5
anysievefolder: yes
sieveusehomedir: false

deleteright: a
umask: 077
allowanonymouslogin: no
allowplaintext: yes
quotawarn: 90
allowallsubscribe: 1
defaultacl: anyone lrs
poptimeout: 10
popminpoll: 0
popexpiretime: 0
logtimestamps: no
plaintextloginpause: 0
loginuseacl: no
singleinstancestore: yes
duplicatesuppression: yes
reject8bit: no
foolstupidclients: 1
</snip>
---
Cyrus Home Page: http://asg.web.cmu.edu/cyrus
Cyrus Wiki/FAQ: http://cyruswiki.andrew.cmu.edu
List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html