Ikran (the guy at the tavern in northern High Rock, his name might be different for other factions) who delivers the quests of the fighters' guild in Cyrodiil, refuses to recognize me when I hand over the completed quests in WW form. As if I had not put the skill point for it. When I go back to human form, everything is back to normal.
I know that the relationships between werewolves and fighters' / companions' guild have always been quite complicated in Elder Scrolls games, but is this a bug or an intended mechanic ?