Pidgin can't connect to XMPP server from new laptop

[Steve Corwin]

Hi,

I've been using Pidgin to connect to the company XMPP server for a 
couple of years.  Recently I got a new laptop, and with this one Pidgin 
keeps reporting "SSL Handshake Failed".  I found a matching entry in the 
FAQ but the suggestion didn't help.

Here's the relevant-looking section of the log file after running
PURPLE_GNUTLS_PRIORITIES="stbeehive.oracle.com=NORMAL:%COMPAT:-VERS-TLS1.2:-VERS-TLS1.1" 
/usr/bin/pidgin --debug

(17:09:54) jabber: Sending (steve at shopzilla.com/Laptop): <?xml 
version='1.0' ?>
(17:09:54) jabber: Sending (steve at shopzilla.com/Laptop): <stream:stream 
to='shopzilla.com' xmlns='jabber:client' 
xmlns:stream='http://etherx.jabber.org/streams' version='1.0'>
(17:09:54) jabber: Recv (186): <?xml version='1.0' 
encoding='UTF-8'?><stream:stream 
xmlns:stream="http://etherx.jabber.org/streams" xmlns="jabber:client" 
from="shopzilla.com" id="80034467" xml:lang="en" version="1.0">
(17:09:54) jabber: Recv (233): <stream:features><starttls 
xmlns="urn:ietf:params:xml:ns:xmpp-tls"><required/></starttls><mechanisms xmlns="urn:ietf:params:xml:ns:xmpp-sasl"><mechanism>PLAIN</mechanism><mechanism>ANONYMOUS</mechanism></mechanisms></stream:features>
(17:09:54) jabber: Sending (steve at shopzilla.com/Laptop): <starttls 
xmlns='urn:ietf:params:xml:ns:xmpp-tls'/>
(17:09:54) jabber: Recv (50): <proceed 
xmlns="urn:ietf:params:xml:ns:xmpp-tls"/>
(17:09:54) nss: Handshake failed  (-12268)
(17:09:54) connection: Connection error on 0x7f8284998410 (reason: 5 
description: SSL Handshake Failed)

The laptop is running Ubuntu 12.04 64bit.  Pidgin is "Pidgin 2.10.7 
(libpurple 2.10.7)".  I'm currently using Kopete so I know it's possible 
to connect from this laptop.  Kopete's notifications are driving me nuts 
so I'd really like to get Pidgin working.  Any suggestions would be 
appreciated.

Thanks,
Steve