I am having this issue as well, and according to Reddit so are numerous others.
http://www.reddit.com/r/ffxiv/commen...one_quest_bug/

I've noticed all the people posting on the Reddit thread (including myself) are from the Gilgamesh server. Not sure of the likelihood of a server-specific bug, but thought it'd be worth pointing out. Neither changing camera angles nor relogging seemed to have any effect on this bug. Users on the Reddit post also report that abandoning and re-doing the quest doesn't fix the problem. I'm running the game on Windows 7.