After interrogating Kainan, Wulfric goes to a water trough to wash his face. In the background, a man is seen walking up to a campfire. When the camera angle changes, the man is not there and we see him walk towards the fire again.
After the trap fails to kill the monster and the appearance of the baby one from the well, Kainan is seen pulling a bucket of blood red water from the well and pouring it on the side. When he then enters the well the water has no blood in it whatsoever.
When Freya comes face to face with the creature in the cave, saliva from the creature's mouth drops on her cheek. On the next shot we see her face is clear. Then on the next shot the creature's saliva is on her face again.
When Kainan and co return back to the village after recovering the items Boromir inspects the horse cargo, which has no cloth covering it and taps the metal twice. As if by magic cloth appears and he lifts it to get a better look.
Shield Hall is shown at the beginning of the movie built around a tree. During the shields competition the tree is shown in full leaf. This part of the tree wouldn't have leaves since there's no natural light.