Ongoing iChat Issues

Long story short - upgraded MacMini server to AirPort Utility 5.5.2 and Time Capsule firmware to 7.5.2. Immediately had problems with iChat (using XMPP, allow federation with all domains). User's valid credentials don't work. Downgraded to firmware 7.4.2, didn't help. Our server URL is duly registered via DNS and is accessible via AFP from the internet and internally. iChat Server Admin log showing the following immediately after stop/start of the service:

...
Dec 20 14:31:09 server1 jabberd/c2s[4152]: connection to router established
Dec 20 14:31:09 server1 jabberd/sm[4149]: connection to router established
Dec 20 14:31:09 server1 jabberd/router[4151]: [c2s] online (bound to 127.0.0.1, port 53771)
Dec 20 14:31:09 server1 jabberd/router[4151]: [macminiserver1.local] online (bound to 127.0.0.1, port 53772)
Dec 20 14:31:09 server1 jabberd/c2s[4152]: [::, port=5222] listening for connections
Dec 20 14:31:09 server1 jabberd/c2s[4152]: [::, port=5223] listening for SSL connections
Dec 20 14:31:09 server1 jabberd/c2s[4152]: ready for connections
Dec 20 14:31:09 server1 jabberd/sm[4149]: ready for sessions
Dec 20 14:31:09 server1 servermgrd[78]: servermgr_jabber[N]: jabberd service startup completed.
Dec 20 14:31:25 server1 jabberd/c2s[4152]: [8] [::ffff:10.0.1.10, port=53789] connect
Dec 20 14:31:25 server1 jabberd/c2s[4152]: [8] [::ffff:10.0.1.10, port=53789] disconnect jid=unbound, packets: 0
Dec 20 14:31:27 server1 jabberd/c2s[4152]: [8] [::ffff:10.0.1.10, port=53790] connect
Dec 20 14:31:27 server1 jabberd/c2s[4152]: [8] [::ffff:10.0.1.10, port=53790] disconnect jid=unbound, packets: 0
Dec 20 14:31:36 server1 jabberd/c2s[4152]: [8] [::ffff:10.0.1.10, port=53795] connect
Dec 20 14:31:36 server1 jabberd/c2s[4152]: [8] [::ffff:10.0.1.10, port=53795] disconnect jid=unbound, packets: 0
Dec 20 14:31:39 server1 jabberd/c2s[4152]: [8] [::ffff:10.0.1.10, port=53796] connect
Dec 20 14:31:39 server1 jabberd/c2s[4152]: [8] [::ffff:10.0.1.10, port=53796] disconnect jid=unbound, packets: 0
Dec 20 14:31:46 server1 jabberd/c2s[4152]: [8] [::ffff:10.0.1.10, port=53801] connect
Dec 20 14:31:46 server1 jabberd/c2s[4152]: [8] [::ffff:10.0.1.10, port=53801] disconnect jid=unbound, packets: 0
Dec 20 14:31:49 server1 jabberd/c2s[4152]: [8] [::ffff:10.0.1.10, port=53803] connect
Dec 20 14:31:49 server1 jabberd/c2s[4152]: [8] [::ffff:10.0.1.10, port=53803] disconnect jid=unbound, packets: 0
Dec 20 14:31:57 server1 jabberd/c2s[4152]: [8] [::ffff:10.0.1.10, port=53807] connect
Dec 20 14:31:57 server1 jabberd/c2s[4152]: [8] [::ffff:10.0.1.10, port=53807] disconnect jid=unbound, packets: 0
Dec 20 14:31:59 server1 jabberd/c2s[4152]: [8] [::ffff:10.0.1.10, port=53808] connect
Dec 20 14:31:59 server1 jabberd/c2s[4152]: [8] [::ffff:10.0.1.10, port=53808] discon...

It will just keep incrementing the port number ad infinitum trying but failing. iChat is Any ideas about what is going on would be appreciated. Thanks in advance ~ Ed