I dont know whether it's a good thing or a bad thing, but last night was the the first time I've ever gotten that error. I tried logging in/out through my toons several times with different windows open, doing different things etc and wasn't able to reproduce the error again. For the rest of the night, nUI worked without a hitch. If all it takes is a quick UI reload to fix, I'm not gonna be to horribly concerned about it
