From the first viewing I started picking up on things I didn't think were quite right, starting with the semi that dumps Ennis in Signal, I thought it didn't seem period, but after numerous viewings I am used to it now.
Jack's use of the word Asphyxiate always seems out of place, as does "commuting" 4 hours a day.
But my favorite is Uncle Harold's disappearing stick of wood off the chopping block.