Plot hole: When we see Sentinel Prime being extracted from the Ark by Optimus, we can see that Sentinel Prime already looks the same way as he does throughout the rest of the movie. The Ark crash landed in the 1960's, the Rosenbauer Panther Fire Truck didn't exist in the form we see Sentinel Prime transform into. All of the other Autobots came to Earth in their proto forms and adopted a disguise when they arrived [we see them scanning alternate modes - one Decepticon is shown doing likewise in this movie.]. Sentinel Prime already has his disguise when on the ark, which isn't possible.GalahadFairlight
Plot hole: The huge explosion that rips through Tara's house isn't very likely. She only left the stove on for a short while, and if there was really a massive concentration of gas as depicted by the explosion, the Agent who fired the shot that triggered it should have collapsed from inhaling so much gas.GalahadFairlight
Plot hole: When Puss is being sent to prison near the end of the film a shot is shown of Softpaws effortlessly holding a golden egg with one hand. However, back in the giant's castle none of them were able to carry a single egg without help.
Plot hole: How did the wolves get across the canyon? Unless they were flying wolves, there's no way they could.