Ok,a few players now are asking this and I'm gettin annoyed having to say the same answer. Someone on myspace fairly recently transferred their account to another myspace. The old one changed to unknown pirate and the new one having the name. Some are confused as hell thinking the unknown pirate account is active when it isn't. Perhaps when a transfer is made,hide or delete the old one from the battle/fight list? It's annoying getting messages over and over again about the same thing.
