As the title suggests I have gotten Level 39 while questing in Dustwallow Marsh. The quests are pretty simple, but there is one quest that is supposedly "bugged" for both Hunters and Warlocks, and that is "What's Haunting Witch Hill". By killing the Undead just north of where you pick up the quest (Jarl's Cabin at 55, 25) you get "information", and you need 10 of these. It is supposed to be a 100% drop rate, but apparently Hunters and Warlocks were not getting drops all the time.
I checked a couple of sites and forums, and the common suggestion was that if the pet gets the killing blow then you won't get the drop. I tried playing with this, but I still did not get drops every time, and I thought it might have something to do with range distance.
Then I tried something based on a hunch, and I got my last three drops in three kills, and that was to make sure I got the first shot in, not the last. I was only able to test this on three before I finished the quest, so if anyone can confirm this, please leave a comment to that effect.