Revealing mistake: When Maverick is tied up following his horse truck tracks are visible on the ground. (01:15:05)
Continuity mistake: When we see Maverick for the first time in the hanging scene he is sitting on a horse with a rope around his neck, which is completely covered by his collar. When the camera angle changes the knot is much higher and the rope is fully visible, although the horse hasn't moved yet. (00:01:35)
Factual error: When Maverick is talking to Joseph in his native language telling him to act angry, if you look just above Joseph you will see a jet flying above his head in the distance. (01:02:10)
Character mistake: After Maverick gives the "actors" their hundred dollars, he says "News travels fast in the Old West." Why would he refer to the west as "old" when, for him, it's the present? This is an expression that didn't come about till later on, when the west BECAME old.
Suggested correction: This was a joke, since it's a comedy movie.
Continuity mistake: After Maverick hands over the $100 bill to the thugs, he's back in his room where he discovers a deck of cards. At first all the cards lie directly on top of each other. When it cuts, the cards are a bit scrambled on top of each other. (00:29:40)
Continuity mistake: The smudge that Maverick gets on his collar in the subsequent fight changes shape from when he's outside to when he's inside. (00:16:50)
Other mistake: When the carriage stops, Maverick, who was holding on tightly to the reins, is propelled over the edge of the canyon. It remains a mystery how the dead driver stays on his seat. (00:40:30)
Continuity mistake: When Eugene hands over his wallet to Danny Glover, Danny is pointing his gun with his arm stretched out. When it cuts, Danny has his arm pulled back and his thumb on the gun's hammer. (00:26:10)
Continuity mistake: When Maverick beats up the four guys whom he had paid for this you see a horse tied in front of the saloon. The horse's head points either to the left or to the right, and this changes several times in alternating shots. (00:15:55)
Factual error: When the camera focuses in the the clock striking five, we see the clock has patent number "19701". While this patent does apply to a clock, it was not issued until 1900, 25 years after the movie was set.
Continuity mistake: In long shots of the town when the movie begins, the town is on different banks of the river in different shots.
Continuity mistake: When Maverick rides into the village on donkeyback he overtakes a wagon pulled by two oxen. A bit further down the road the same wagon is coming from the right (it is the same as the oxen show the same patterns). (00:05:00)
Revealing mistake: During the explanation of security procedures on the paddlewheeler there is a modern ceiling fan in the backround. (01:21:00)