Rails - Jun 2012 - Rendering json has encoded characters

hello all
i''m using rails3.0.10

    def districts
        @names = Node.where("name like ?", 
"%#{params[:term]}%").limit(5).map(&:name)
        respond_to do |format|
          format.json {render :json => @names}
          format.xml {render :xml => @names}
        end
      end

render xml get right names
but render json make the names is encoded

any help?

Thanks in advance

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