Hey thanks for posting a known-good result I can follow. I've apt-get updated/upgraded everything and run update-ca-certificates but still no luck. The MTU on our network is 1496 so that almost certainly must be the issue. I'll let everyone know if it is.
Another interesting thing is that your connection is negotiating the use of TLS 1.1. If you have some type of man-in-the-middle box or stateful firewall, it may be getting upset by that.
