A bummer when I was trying to set my UI in the Beta and got that error!
Anyway, there are a post at least on the Blizzard forums:
http://forums.worldofwarcraft.com/th...Id=26725722535
Nothing new tho. I would think that is a bug.
Another thing, I'm not on live but the recente changes they made to Nameplates are still borked in the Beta.