All the transactions that go to mtgox are spread out over blocks that go back for years. It's only useful to reverse the most recent block(s). This is because b

All the transactions that go to mtgox are spread out over blocks that go back for years. It's only useful to reverse the most recent block(s). This is because blocks are made up of transactions. You can't just cherrypick them out, and each block needs the previous unchanged. You might get some more details from this http://www.reddit.com/r/Bitcoin/comments/1a51xx/ http://www.reddit.com/r/Bitcoin/comments/1a51xx/. It descries a fork in the blockchain that occured a while ago.