I just found a new bypass for minecraft bukkit 4.0...
Some People were annoyed by the patch of bukkit, but after lots of hard work, I found the magic bullet..

In the video u can see my dupes... u find the tutorial under this link http://www.fileflare.net/download.php?id=5085 (the link should deny that the dupe gets too fast public) :) Enjoy it and crash some economy at some servers :)