Deliberate mistake: In the scene where Marmaduke runs over Don Towmbly, you can "see" the soft mat where he lands on his face: it wobbles.
Marmaduke (2010)
1 deliberate mistake - chronological order
Directed by: Tom Dey
Starring: Owen Wilson, Kiefer Sutherland, Steve Coogan, Emma Stone, Christopher Mintz-Plasse, George Lopez, Stacy Ferguson
Continuity mistake: After Marmaduke squishes the toothpaste, the amount on the wall decreases between shots.
