I have tried it with both a werewolf and a vampire and when the quests given by Arngeir at High Hrothgar to locate the words of power gets to Arc Wind Point the word of power does not get accepted by the game as being learned no matter what I have tried and trust me I tried several different things I am thinking that maybe it is because there are two shouts with the same title? I am no world class programmer but usually, to my understanding, you can can not give a line or string of code the same delimiter otherwise the program will not understand that you are meaning for it to do two different things. This is just one of many bugs which I am beginning to understand all to well that are stemming from the Dawnguard DLC; I downloaded all of the DLC for Oblivion the day it came out and never had problems with it so I am wondering what happened people?