Here is a world of warcraft cataclysm roll bug thats going around. This bug use to work in the original world of warcraft before the expansions and is now working once again. Keep in mind this bug may or may not be working based on patches, but give it a try and report back here if you managed to get it working for yourself. This bug was confirmed to be working by the GMs so that should speak for itself on the validity of it.
– Have a group of people set up to roll for a specific item in the game.
– Now make sure you are the only person that rolls greed for the item.
– Now wait for the person who rolled need and won it in the roll off.
– Go to the corpse and try to look at the item after you rolled greed.
– The corpse will bug out and you should be able to either loot the item, or have the item duplicated in the corpse loot screen.
This bug was one of the biggest roll bugs out there back in the day and is working again right now. Keep in mind if you are reported there is a chance you can get in trouble for this, but you still should try to use it on groups that dont speak English well using the random raid finder in the game. Also you should note that if this is not working for you its due to a patch bugging it out, so you should either try a new variation of this bug or maybe go try it on some private servers to see if you can replicate it in the game.