These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Alas, Poor Scrappy: Look (Martin's homely Comanche trophy wife) is cringe-inducing in her Modern Minstrelsy....but you will feel bad when you see her corpse after she's massacred during a cavalry raid.
The atrocious way Lucy Edwards sets her jaw before screaming bloody murder when she realizes that Comanches are approaching the homestead (when a simple Oh Crap expression would have been much more effective).
The first time we see Henry Brandon as Scar. He is obviously wearing makeup.
The actor playing the Indian corpse early on picked a quite unfortunate moment to take a deep breath.