Now Quest 13: Nature's Wrath is broken and cannot be turned in. The game freezes and dialog box disappears after selecting the quest and one line of dialog displays, leaving the hunter and arms trader over a blurry background. This affects both the 64 bit and 32 bit versions.
Viewing post in Knightly Passions 0.37! RELEASE! comments
It was in my inventory when I attempted to turn in. There was a similar issue in version 0.36 where when you tried to turn in the golem head, the entire scene would play normally, but when the arms trader went to go to bed and you were supposed to leave her house, all UI elements vanished and you were left staring at the blurry background image of her house with no way to do anything except reload a previous save.