Leo and I discuss this long-anticipated, final "Second Tuesday of the Month" patch update for Windows XP - which has finally arrived. We share a bunch of interesting miscellany, then take a very deep dive to examine and understand the technology, events and implications of yesterday's (April 7, 2014) discovery of a two-year-old critical buffer overrun bug in the open source industry's OpenSSL protocol package. It's been named "Heartbleed" because it abuses the new TLS "heartbeat" extension to bleed the server of critical security information.