When the Prince's helper Charles Renbock is leaving the Prince at the castle, they are having a discussion about the Queen and how she is crazy. When the camera goes back and forth between the characters, Charles's collar is open, then closed, and then open again.
After the Queen finds out Snow White is alive she storms to her room wearing the Elizabethan stiff collar. She enters the closet with the collar on but in the next shot of her approaching the mirror from inside the closet it disappears.
Around 18 minutes into the film, in the forest, as the Prince is bidding adieu to Snow White, he is at first standing on the left side of his companion, Charles. One second later, he is standing on Charles's right.
When the Queen is getting her beauty treatment, she gets the brown feces of lovebirds put on her face. Lovebirds' feces range in color from light green to white in the real world. But the movie is set in a fantasy world.
The dwarfs have strawberries (a summer fruit) in winter. Since this movie is set in a fantasy realm, winter strawberries are a possibility if the writers say so.
Brighton, as soon as he puts up a sign of increased taxes outside the town hall, says "We are putting your tax dollars to good use". While "dollars" are American, the first banknote-type instrument was used in China in the 7th century, during the Tang dynasty (618-907)
When Prince Alcott and Snow White are sword fighting in the forest, Snow White attempts to cut the Prince and he was supposed to block her, but he missed and her blade is on the inside of his, which wouldn't have stopped the sword at all.
When Snow White is about to go outside the castle for the first time, you hear the clanking of the knights' axes but we can see clearly that they don't hit each other.
The Queen somehow taxes the destitute villagers to pay for another incredibly lavish party - instead of commanding the wealthy caterers to provide the party for free, or else.