Plot hole: After the dinosaur kids wrecked the playground, Manny tells Sid, "Whatever they are, take them back" and someone says "What are they?" as well. Later, when Mummy Dinosaur appears, Ellie says, "I thought those guys were extinct!" and one minute later Manny says, "She's a dinosaur!" How could they possibly not see that the kids were dinosaurs if they already knew about dinosaurs in the first place?
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Mistakes
In the credits, Josh Peck is said to voice Rudy. He actually voiced Eddie. See more...
Ice Age: Dawn of the Dinosaurs mistakes
Continuity: When Buck tells about his fight with Rudy, he swings while saying "Back, forth" in front of the others. They are looking the wrong way.
Continuity: In the beginning, Scrat is sniffing for his acorn and reaches the end of the cliff. Before he reaches the end, look at his saber teeth closely; they've disappeared. When his nose goes over the edge, they reappear.
Ice Age: Dawn of the Dinosaurs quotes
Crash: Dude, You're awesome! You're like the brother I never had!
Sid: I know what it's like to feel abandoned.
