When Zar comes riding back and tells Blue that he cannot get a horse up the trail to the gold mine, let alone a wagon, Blue tells him he can take the wagon up a trail 2 days ride from Hard Times. A minute later, the miners come down the trail Zar just rode in on and, at the rear of the bunch of miners on horseback, is a wagon full of miners that just came down the trail that Zar said he could not get a wagon over.
The first time the miners visit Hard Times, one of Zar's girls is dancing on a table with several miners standing around her. Later the same girl is dancing on the the table with the same men around her in the exact same order of being next to each other.
Mayor Blue points (to Zar) to the miners riding into town and lowers his arm. The shot moves to one from behind Blue to his left, and his arm is still pointing (and again lowers it).
When Avery goes back to his saloon, the windows are broken in a different manner than they were just a couple minutes before.
Although there are seven barrels and crates on the stagecoach, Maple John Anderson is able to unload them in the five seconds he is off-screen.
One of the old tombstones in the graveyard is shaking from the wind.
Mayor Blue points to his diagonal right to where the miners are riding into town, and Zar looks over his left shoulder in that direction. His "ladies" then look and start to wave, though they are looking about 90 degrees off. They should be looking to their right, but they are looking and waving straight ahead.