So-called Silk Road 2, the sequel to the Internet’s most notorious black market, has been hit with a theft of bitcoins worth millions. Some reports put the amount stolen at nearly $3 million. Hackers reportedly emptied Silk Road 2’s bitcoin wallet using the same “transaction malleability bug” in bitcoin’s protocol that apparently led to bitcoin exchanges such as Mt. Gox and BitStamp shutting down withdrawals earlier in the week.