I heard a rumor that mmo got busted using a newer dupe that was found about a month ago. There was a bit of controversy around it given that proxies are always utilized, however what it came down to was himself and alot of the upper mmo staff utilize the SAME proxies for multiple accounts and that all the accounts associated with said proxies got owned.
Personally I think this dupe was intentionally implemented in order to catch dupers, given that it was basically the same process as an older dupe that was fixed long ago and wasn't too hard to figure out (Especially if you were around back then).