When Floki and Ubbe talks on the docks, a modern house can be spotted in the hills.
Lagertha pronounces Aud's name differently from everyone else, ie as "Au-" and a hard "d". The other characters (mostly Floki) uses the Icelandic pronunciation, where the "Au" sounds like "öi" (this is also the Norweigan pronunciation of the same spelling) and the "d" would actually be a "ð" which sounds like the "th" in the. Neighter of these reflects the old Norse pronunciation which would have been "Auð", with an "English" "Au-" and a "Icelandic" "ð".