lets make it short
#1 I was contacted (publicly!) by MZ via twitter. I know this will not be accepted as proof.
#2 The breach hilarious is referencing was announced by theymos 25.05.2015[1]. If this is not the case, please provide a link to a thread discussing the incident in question.
#3 Archive.is has a pretty good history[2] of the seclog.php[3] page
#4 MZ changed the password the same day[4]. Due to my timezone settings and my lack of enthusiasm I didnt bother to check how many hours passed.
You make a decent case.
I thus consider the accusation refuted and opose the rating until another accusation should be presented (if any).
I do not primarily because of this:
It is a little odd that you seem to be unable to sign a message from a prior known address.
What is the problem with your PC? Why are chances low of recovery??
Not being able to sign from any prior known address or PGP key makes me even more suspicious.