Problems with IMAP XFER 3.0.4->3.0.4 server

[Michael Glad]

I'm in the process of moving dead but currently not to-be-deleted users off a  Cyrus 2.5.8 server to two new 3.0.4 servers.
I use the XFER command. It works fine from the 2.5.8 server to the 3.0.4 servers but I can't move between the 3.0.4 servers or back to the 2.5.8 server.
I've debugged  the imapd processs and it seems that the problem is that mailbox lookup returns empty and nothing consequently is done

I.e (details masked)

#  telnet server-258 143
00 login cyrus SNIP
00 xfer user/xyzzy  server-304-a
00 OK Completed

The user was actually moved

# telnet  server-304-a
00 login cyrus SNIP
0 xfer user/xyzzy  server-304-b
0 OK Completed

Nothing happened.

I've used quite a lot of time on  the problem and could need some help.. : -)

Included below is  the config for the two 3.0.4 servers-

The logs are not of much help.

- Michael

+++++++++++++++++++config+++++++++++++++++++
partition-default: /home/maildata/0
metapartition-default: /home/metadata/0
partition-0:                   /home/maildata/0
metapartition-0:               /home/metadata/0
partition-1:                   /home/maildata/1
metapartition-1:               /home/metadata/1

munge8bit: 0
configdirectory: /var/lib/imap
sievedir: /var/lib/imap/sieve
sendmail: /usr/sbin/sendmail

hashimapspool: true
fulldirhash: 1

# SASL decls
...
# END

admins: cyrus cyrus@ cyruss
unixhierarchysep: yes
altnamespace: yes
virtdomains: no
defaultdomain: exampleisp.net

allowplaintext: yes
tls_session_timeout: 5
anysievefolder: yes
allowusermoves: 1
expunge_mode: delayed

metapartition_files: header index cache expunge squat

duplicate_db: twoskip
ptscache_db: twoskip
seenstate_db: twoskip
tls_sessions_db: twoskip
statuscache_db: twoskip

lmtp_downcase_rcpt: yes
internaldate_heuristic: receivedheader

delete_mode: delayed

statuscache: on

singleinstancestore: 0

sharedprefix: user

timeout: 30
autocreate_sieve_folders: "Spam"
#
tcp_keepalive: 1
tcp_keepalive_idle: 300

#
proxy_authname: cyruss
proxy_password: <snip>
+++++++++++++++++++end-config+++++++++++++++++++