During the flashback scene at the end of the movie, when Jericho gets out of bed and puts on his boots, they have rubber soles with angled tread.
Preacher Joshua frequently breaks into the song "Sky Full of Angels". Although it sounds like a hymn, it is actually a late 20th century Country & Western song.
(at around 20 mins) Lavalier transmitter pack clearly visible in the small of R. Lee Ermy's back.
(at around 40 mins) Camera equipment reflected when Jericho looks in a store window.
(at around 50 mins) Mattress is very obvious when a man gets shotgunned on the porch.
(at around 25 mins) Windscreen visible on bobbing boom.
(at around 1 min) Big, fuzzy gray zeppelin hovering as they walk the trail.