(some discussions are in http://www.speedrun.com/mc/thread/6aoxu/3 - 4)

Let's say 6 kinds of log set possible map glitch, Single world way: mine a log and quad-dup it, craft a wooden axe mine the other 5 kinds of log or mine a log and tripdup it(may have some tiny change), and get 3 gold from a village chest, make golden axe.. Transfered way: mine a log and dup it warp near a village chest and get gold warp into a libaray and make golden axe warp and cut