When the Viking women are running along the beach, one of them is wearing sunglasses.
In the great hall of the building the curtains are held up by metal curtain rings.
When the Viking woman and man are being burned at the stake, the piles of burning wood are clearly far in front of them.
The Viking Women go from being barefoot to wearing shoes and sandals throughout the movie. At no time are they carrying shoes.
In the cave where the Viking men are held captive, the floor is hard and flat, quite unlike the dirt floor in a real cave.
At 11:19 - when the ship was at sea, you can see the camera boat for a few seconds.