It still works from time to time, but you have to very precise.
OK, this dupe involvs a shack and a merchant. Put all your resources, runes, etc on the merchant (price it up so no one steals it or buys it). Also put Gold on the shack if you want to dupe that too.
Before the server goes down, log on an account starting with A and an account starting with W. Depending on what server you belong to, A may go down before W, or W may go down before A. With Vindication, A goes down first.
OK, before server reset, press the minus button on the gold and put '999999999' in the window (this ensures that you withdraw all the gold). DO NOT withdraw yet. Now go to the merchant and Select All. Put the withdraw gold box over the top of the take box. Now, once A account goes down, click the check mark on the withdraw gold and take from the merchant. You only have about 4 seconds, so be sure to be quick. If you are only duping 1 or 2 things, wait about a second before withdrawing.
Now, the server goes down. When you log back in, you will have resources and gold in your inventory. If it worked correctly, you will have the same gold and resources in the shack still. NOW, this is VERY important. Do NOT, I repeat, DO NOT, pull the resources from the shack yet. Go straight to the warehouse, deposit all the resources. Now withdraw the resources in about 3 different stacks. Deposit all resources back into the warehouse and pull out in one big stack. Now you may mix the original resources and duped resources together. With the gold, you just need to deposit it into a bank with other gold in it. This ensures the original serial code is erased.
This method (before they sort of fixed it) worked every single time you did it.
Have fun
