Sorry, meant to update this bug.  After further debugging, this turns
out to be a bug in the Webex Connect TLS implementation -- it only
implements TLS 1.0 (gnutls tries 1.1 first), and the Webex side has a
bug in how it handles negotiation back to TLS 1.0.  Basically it's the
bug described in <http://tools.ietf.org/html/draft-ietf-tls-
interoperability-00#appendix-A.6>.  I've reported this to the Webex
people but I have not anything back except an acknowledgement that their
dev team has been told about the problem.

This in some sense is a pidgin -> empathy regression, and it would be
easier to work around if the empathy "use old SSL" checkbox actually
worked in this case.

-- 
gnutls can't negotiate tls connection to webex connect (empathy vs pidgin 
regression)
https://bugs.launchpad.net/bugs/418935
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