debug output from pidgin 2.10.0 on windiws:

(19:41:27) util: Writing file accounts.xml to directory C:\Documents and Settings\Administrator\Application Data\.purple
(19:41:27) util: Writing file C:\Documents and Settings\Administrator\Application Data\.purple\accounts.xml
(19:41:28) prefs: /pidgin/blist/list_visible changed, scheduling save.
(19:41:29) prefs: /pidgin/blist/list_visible changed, scheduling save.
(19:41:34) util: Writing file prefs.xml to directory C:\Documents and Settings\Administrator\Application Data\.purple
(19:41:34) util: Writing file C:\Documents and Settings\Administrator\Application Data\.purple\prefs.xml
(19:41:35) prefs: /purple/savedstatus/default changed, scheduling save.
(19:41:35) account: Connecting to account <email address hidden>/windows.
(19:41:35) connection: Connecting. gc = 029F53F0
(19:41:35) dnssrv: querying SRV record for zazoid.com: _xmpp-client._tcp.zazoid.com
(19:41:35) dnssrv: Couldn't look up SRV record. DNS-имя не существует. (9003).
(19:41:35) dnsquery: Performing DNS lookup for zazoid.com
(19:41:35) dnsquery: IP resolved for zazoid.com
(19:41:35) proxy: Attempting connection to 91.149.158.47
(19:41:35) proxy: Connecting to zazoid.com:5222 with no proxy
(19:41:35) proxy: Connection in progress
(19:41:35) proxy: Connecting to zazoid.com:5222.
(19:41:35) proxy: Connected to zazoid.com:5222.
(19:41:35) jabber: Sending (<email address hidden>/windows): <?xml version='1.0' ?>
(19:41:35) jabber: Sending (<email address hidden>/windows): <stream:stream to='zazoid.com' xmlns='jabber:client' xmlns:stream='http://etherx.jabber.org/streams' version='1.0'>
(19:41:35) jabber: Recv (244): <?xml version='1.0'?><stream:stream xmlns:stream='http://etherx.jabber.org/streams' xmlns='jabber:client' from='zazoid.com' version='1.0' id='xbu8yzthrqlffao1ffytcns0ljh0e4kbgfkfeew6' xmlns:ack='http://www.xmpp.org/extensions/xep-0198.html#ns'>
(19:41:35) jabber: Recv (442): <stream:features xmlns:stream='http://etherx.jabber.org/streams'><starttls xmlns='urn:ietf:params:xml:ns:xmpp-tls'/><address xmlns='http://affinix.com/jabber/address'>80.94.239.51</address><mechanisms xmlns='urn:ietf:params:xml:ns:xmpp-sasl'><mechanism>PLAIN</mechanism><mechanism>DIGEST-MD5</mechanism></mechanisms><auth xmlns='http://jabber.org/features/iq-auth'/><register xmlns='http://jabber.org/features/iq-register'/></stream:features>
(19:41:35) jabber: Sending (<email address hidden>/windows): <starttls xmlns='urn:ietf:params:xml:ns:xmpp-tls'/>
(19:41:35) jabber: Recv (50): <proceed xmlns='urn:ietf:params:xml:ns:xmpp-tls'/>
(19:41:35) nss: <email address hidden>,CN=Alexander Gorodinski,O=Zazoid.com,L=Minsk,ST=Some-State,C=BY <email address hidden>,CN=Alexander Gorodinski,O=Zazoid.com,L=Minsk,ST=Some-State,C=BY
(19:41:35) certificate/x509/tls_cached: Starting verify for zazoid.com
(19:41:35) certificate/x509/tls_cached: Checking for cached cert...
(19:41:35) certificate/x509/tls_cached: ...Found cached cert
(19:41:35) nss/x509: Loading certificate from C:\Documents and Settings\Administrator\Application Data\.purple\certificates\x509\tls_peers\zazoid.com
(19:41:35) certificate/x509/tls_cached: Peer cert matched cached
(19:41:35) nss/x509: Exporting certificate to C:\Documents and Settings\Administrator\Application Data\.purple\certificates\x509\tls_peers\zazoid.com
(19:41:35) util: Writing file C:\Documents and Settings\Administrator\Application Data\.purple\certificates\x509\tls_peers\zazoid.com
(19:41:35) certificate: Successfully verified certificate for zazoid.com
(19:41:35) jabber: Sending (ssl) (<email address hidden>/windows): <stream:stream to='zazoid.com' xmlns='jabber:client' xmlns:stream='http://etherx.jabber.org/streams' version='1.0'>
(19:41:36) jabber: Recv (ssl)(244): <?xml version='1.0'?><stream:stream xmlns:stream='http://etherx.jabber.org/streams' xmlns='jabber:client' from='zazoid.com' version='1.0' id='4hmksal8qj127u3teltspd46spl73hd8z0srbez1' xmlns:ack='http://www.xmpp.org/extensions/xep-0198.html#ns'>
(19:41:36) jabber: Recv (ssl)(422): <stream:features xmlns:stream='http://etherx.jabber.org/streams'><address xmlns='http://affinix.com/jabber/address'>80.94.239.51</address><mechanisms xmlns='urn:ietf:params:xml:ns:xmpp-sasl'><mechanism>EXTERNAL</mechanism><mechanism>PLAIN</mechanism><mechanism>DIGEST-MD5</mechanism></mechanisms><auth xmlns='http://jabber.org/features/iq-auth'/><register xmlns='http://jabber.org/features/iq-register'/></stream:features>
(19:41:36) sasl: Mechs found: PLAIN DIGEST-MD5
(19:41:36) jabber: Sending (ssl) (<email address hidden>/windows): <auth xmlns='urn:ietf:params:xml:ns:xmpp-sasl' mechanism='DIGEST-MD5' xmlns:ga='http://www.google.com/talk/protocol/auth' ga:client-uses-full-bind-result='true'/>
(19:41:36) jabber: Recv (ssl)(196): <challenge xmlns='urn:ietf:params:xml:ns:xmpp-sasl'>cmVhbG09Inphem9pZC5jb20iLCBub25jZT0ianFobnFtbjF6NDc5cVJOQ2VndEZEQT09IiwgcW9wPSJhdXRoIiwgY2hhcnNldD11dGYtOCwgYWxnb3JpdGhtPW1kNS1zZXNz</challenge>
(19:41:36) sasl: DIGEST-MD5 client step 2
(19:41:36) jabber: Sending (ssl) (<email address hidden>/windows): <response xmlns='urn:ietf:params:xml:ns:xmpp-sasl'>dXNlcm5hbWU9InRlc3RvciIscmVhbG09Inphem9pZC5jb20iLG5vbmNlPSJqcWhucW1uMXo0NzlxUk5DZWd0RkRBPT0iLGNub25jZT0iSjBrOFlSaGRmd0ZTV0JZSkkxWnJSeTlqSFZFZEdud2tBbUlUQmdFc1Vpcz0iLG5jPTAwMDAwMDAxLHFvcD1hdXRoLGRpZ2VzdC11cmk9InhtcHAvemF6b2lkLmNvbSIscmVzcG9uc2U9NDhhYTkyZTM5ZDVkMjk2YWNhOTZiZmE0YmFkZDkzN2QsY2hhcnNldD11dGYtOA==</response>
(19:41:36) jabber: Recv (ssl)(51): <success xmlns='urn:ietf:params:xml:ns:xmpp-sasl'/>
(19:41:36) sasl: DIGEST-MD5 client step 2
(19:41:36) sasl: no server challenge
(19:41:36) connection: Connection error on 029F53F0 (reason: 3 description: Invalid response from server)
(19:41:36) account: Disconnecting account <email address hidden>/windows (00E58CF0)
(19:41:36) connection: Disconnecting connection 029F53F0
(19:41:36) jabber: Sending (ssl) (<email address hidden>/windows): </stream:stream>
(19:41:36) connection: Destroying connection 029F53F0
(19:41:40) util: Writing file prefs.xml to directory C:\Documents and Settings\Administrator\Application Data\.purple
(19:41:40) util: Writing file C:\Documents and Settings\Administrator\Application Data\.purple\prefs.xml
(19:41:40) util: Writing file accounts.xml to directory C:\Documents and Settings\Administrator\Application Data\.purple
(19:41:40) util: Writing file C:\Documents and Settings\Administrator\Application Data\.purple\accounts.xml
(19:41:41) prefs: /pidgin/blist/list_visible changed, scheduling save.
(19:41:42) prefs: /pidgin/blist/list_visible changed, scheduling save.
(19:41:47) util: Writing file prefs.xml to directory C:\Documents and Settings\Administrator\Application Data\.purple
(19:41:47) util: Writing file C:\Documents and Settings\Administrator\Application Data\.purple\prefs.xml