Yes because your finally updating the spells_us.txt file for the changes in kunark that were brought in back in July last year. You have to update the default UI files with the files found
here for live. Alternately you can use the updated default UI that is in my sig that also fixes all of the Project 1999 xml changes so you no longer get any errors.
I believe that Duxa's fresh install found
here will also fix the UI issues for you as well.