Anonymity leaks within ProtonMail Beta

This is a short commentary on a few overt anonymity gaps in ProtonMail Beta, ver 1.12.  These concerns were emailed to ProtonMail Security on January 21, 2015, and they provided a response that is included at the end.

0daymandias - an original work from #cyberantiquity

                              0daymandias

                                   by Percy Basshe Shelley

               I met a hacker from a proxied land

                    Who said: "Two vast and trunkless commits of stone

               Stand in the desert. Near them on the sand,

                    Half sunk, a shattered botnet lies, whose spam

               And exploit shells and sneer of DNS command

                    Tell that its coder well those payloads read

               Which yet survive, stamped on these XORed things,

                    The IDS that mocked them and the APT that fed.

               And commented out these words appear:

                    'My name is 0daymandias, king of kings:

               Look on my cybers, ye mighty, and despair!'

                    Nothing pwned remains. Round the decay

               Of that colossal takedown, boundless and bare,

                    The lone and level bits stretch far away.