When Manny, Diego, and Sid are on the ice floe with the giant crab during the storm; as the large wave approaches, Sid grabs the right fore leg of the crab. As the go through the wave, Sid is still holding the right fore leg. When they emerge from the wave, Sid is now holding what would be the left fore leg (it curves left (when facing the crab) back into the body).
During the chase at switchback cove, Manny 'holds Sid higher,' and promptly hits him against three trees. In the next shot, they are on a ledge, and no trees are in sight. In earlier overhead shots of the area, there are also no trees seen along the path used.
Many of the pirates' weapons switch places and hands during the land bridge trap sequence.
Firstly, Gupta, on Gutt's order, gives his dagger to Louis, who leaves it behind when he digs under the ice. When Gupta and Flynn chase Sid and Granny to the ship's underbelly shortly after, he has Gutt's dagger instead, which Gutt dropped at the ship's front when Louis smashed ice on his foot, and Flynn, who previously possessed a skull sword, has Raz's spear, which vanished from her grasp inexplicably after Manny broke free. Then, as Gupta and Flynn flee the ship's underbelly, then leave their weapons behind.
As we cut back to the ship's topside, Raz has her spear back. Gutt is initially weaponless, but has his dagger back at the pirates corner Manny, Diego, Shira, Crash and Eddie. Gutt also has his original dagger back, and Flynn has his skull sword back. Then, in the shot where Precious blasts Gupta, Razz and Flynn, Gupta, Flynn and Gutt are all unarmed, while Raz's spear in knocked overboard with her.
When Peaches cuts Ellie free shortly after, she does so with Gupta's dagger, tossing it away from the ship's front after. Finally, when the floe Manny and Gutt are on is raised by the seabed rock, the floe is initially weaponless, but gains Raz's spear, Gupta's dagger, Flynn's skull sword, and another sword knocked from Raz's punch earlier, all of which were in different locations. All four weapons are either lost overboard or broken during Manny and Gutt's fight.
During the chase at Switchback Cove, when Manny, and Diego leap onto the ice floe, and Manny catches Sid, Diego (with Granny on his back) is on Manny's left. But in all subsequent shots, Diego and Granny are on Manny's other side, until Diego slams into a ice rock leading up to the ice ship.
Scrat is referred to as a rodent by one of the Scratlantians. He is clearly not a rodent, having large canine teeth and no visible incisors. Rodents have no canines and large, prominent incisors that never stop growing.