When EB is going up to see Al, and says from the upstairs railing to Dan, "I miss our morning coffee", Adams looks up at him over his left shoulder. When the camera angle changes, he is looking over his right shoulder.
During the scene where Captain Turner is telling Dan he doesn't want to "Speak to Mr Hearst that way again", Dan pulls up his left suspender twice.
While Trixie is watching Mrs. Elsworth savor owning the bank from her tellers window she is seeing her through several bars of the teller window. When Mrs. Elsworth looks back at her Trixie is looking at her from her window and not through bars.
When Dan hits Turner in the back with the log, the log flexes. It is obviously made of rubber.
When sheriff Bullock is in the livery, a modern rubber tread sole in his boots is clearly visible.