Continuity: Doc's lantern disappears when they reach the house after working in the mine.
Continuity: Dopey breaks off the front door handle and seconds later it's there again.
Continuity: When the dwarfs reach the house after working, they drop some tools and scurry behind the trees. A couple of minutes later they have tools again.
Revealing mistakes: In the last scene, the Prince shimmies. The cels weren't lined up correctly when the scene was shot, and his body shakes. Walt Disney was horrified when he saw the mistake in the color dailies, and wanted it corrected. No money was available to make the correction (the film was already far over budget), so Walt's brother and business partner, Roy Disney, declared "Let the Prince shimmy!" And so he did... until 1993, when the mistake was corrected during Disney's digital restoration of the film.
Continuity: When the birds are putting yellow flowers in the vase, right before they put the final one in that sticks up a bit in the middle, a flower that ends up right behind it appears out of nowhere.
Continuity: The string changes on the apple while being poisoned. It starts out plain and dark, but turns pink with a bow on the end.
Continuity: As Snow White is piling clothes on top of the deer, birds drop a green cloth over the chipmunk on the deer's back. In the next shot, the cloth is now a shirt sleeve.
Revealing mistakes: When the crag the Witch is standing in is hit by lightning, the splashes of rain on the wall behind the boulder are seen over it. Apparently the cameraman placed the cels on the wrong order, placing the splashes over the boulder instead of underneath. The splashes form the silhouette of the background behind the boulder, which is made evident as it rolls off the cliff.
Miscellaneous: Just before Dopey tries to jump towards the piece of soap, the soap moves a few inches towards him.
Continuity: Marching home from the mine, the dwarfs march with left down on the downbeat. After returning from a short cut away scene, the dwarfs then march with their right foot on the downbeat.
Factual errors: When Doc is assaying the (already cut) gemstones from the mine, he puts the jeweler's loupe into his eye backwards.
Continuity: When Snow White first decides to clean the dwarves' house, she takes off her cape and hangs it on the wall. When the dwarves' return from the diamond mine later and are shocked to find the house clean, the cape is gone.
Continuity: When Snow White is cleaning the cabin, the birds put daffodils in the vase. Later when Sneezy goes to the flowers on the table and sneezes, the flowers have turned into goldenrod.
Continuity: The size of Doc's "swanette" changes size and appearance before the end of "The Silly Song".
Continuity: The famous sequence where the dwarves race back to the cottage to save Snow White is filled with continuity errors: - if you pause the film just when the turtle is passed for the last time, you can see Sleepy is mounted on a stag. However, for the rest of the film he is mounted on a doe. - Bashful is originally in front of Sneezy, yet for the rest of the chase the order is mysteriously reversed. - In another scene, just before Snow White bites the apple, Sleepy and Sneezy are seen on the deer, while Bashful is riding another deer by himself (Sleepy and Bashful have been switched). - In one scene, the whole order of the dwarves is changed (Dopey riding a stag, Sneezy sitting alone on a doe...)
Continuity: Sleepy and Bashful's beards are the longest in most of the film, with Grumpy's beard shorter. However, when the dwarves peer over the edge of the cliff to see the Witch's demise, Grumpy's beard is suddenly longer than the others by far.