I might tell people privately, but not here. So we have 1 theory : mysterious vendors whom nobody has heard from in weeks/months exploited "transaction malleability" bug in bitcoin.. which.. ohyeah.. can't be "exploited" to do anything relating stealing anything (https://en.bitcoin.it/wiki/Transaction_Malleability) And now we have theory2. Well Londonites, you've got a very wealthy thief living amongst you..