Well, I don't know if it's a problem with Blizzard, or what. All I can tell you is that I came across "nil" in the Quest Log Database. First time I saw this.
Screen Shot - look at all of the "nil"s.
The thing that amazes me is that they all have a location attached to them. They act like there is more to the quest, but there is something wrong and Carbonite is not printing all of the text. (Just a thought.)