Revealing mistake: When we Yosemite Sam holding on to a branch on the tree after the explosion, some of the apples are being held on to the branches without their stalks.
Bunker Hill Bunny (1950)
1 revealing mistake - chronological order
Continuity mistake: In a full length view of the two forts, Sam's fort has a flag reading "They" and Bugs' fort has a flag with "We" on it. When we see Sam tunnelling underground, the words on the flags are missing.