Revealing mistake: When Tom is punctured in the rear by the fork that Nibbles is holding, his tail is missing.
The Little Orphan (1948)
1 revealing mistake - chronological order
Directed by: William Hanna, Joseph Barbera
Continuity mistake: When Nibbles launches a candle into Tom's tail, it burns him and turns Tom's fur brown. When we see Tom waving his white flag in surrender after he has crashed into the cabinet, his fur is now blue again.