A name filter has been added. Right now it blocks everything in a name except A-Z, spaces, and the ` mark. It will also start filtering out things we don't want in names like, lord, sir, king, and obnoxious/blatently nonrp stuff.
Just because a name isn't blocked by the new filter doesn't mean its an ok name, this is just to cut down on how much Ben has to argue with people who create a name then get attached to it and want to keep it.