The Legend: Walt Disney was able to spot a single frame of a naked woman in a cartoon.
Behind the Legend: The original story is that a group of animators inserted a single-frame picture of a naked woman into a cartoon test reel to see if their boss would notice it when he reviewed the morning rushes. Disney did indeed spot the frame and, noting in particular that it was of his wife, fired everyone.
Needless to say, this never happened. Disney's animators had too much respect for both Disney and his wife to ever do such a thing. What did happen, however, during the production of Snow White and the Seven Dwarfs was that a single frame of Snow White running through the forest with a breast exposed due to a tear in her dress made it into a near-final print. Walt Disney himself noticed the flicker of inconsistence and asked that the film be stopped and rewound a frame at a time until the problem was pinpointed.
The film was fixed before distribution. Nobody was fired over the incident, as it was determined that the exposed breast was just an ink-and-paint malfunction.