Disappearing Quests (Fires in the East)?

Anyone have quests disappear on them? I had fires of the east, but it went poof. Funny thing is Captain Arne had things to say about it, I'd talk to him, and it appeared that the conversation was over, but after the exclamation was there. Talk to him again and it was like I never talked to him.

I think it was Warmaster Tydus that I received the quest from, but he won't say anything now.