Gravus sends you off telling you to gather (I forget whether he said logs or boards) to make a short bow. But the quest log says make a short bow, and return. So I made the bow and he's not happy with me. The quest log should prolly reflect what he really wants you to do.
Update: It's logs he wants, and even with them he wouldn't accept it as done. I deleted the quest and tried again, same thing. He's also repeatedly giving me the forms and tools over and over, when i retake the quest, as well.