Continuity mistake: When Nani brings Mr. Bubbles into her home, she spots the paper on the fridge that says "Home Alone," and she runs over to hide it. In this shot you can see that the top of the fridge is empty. Then in the next shot a green towel is hanging down off the top. (00:10:55)
Continuity mistake: When the squirrel gets stuck between the 2 glaciers he gets stuck at the bottom of them, but then it shows him getting fired out of the top of them. (00:02:49)
Suggested correction: Scrat may have got sucked up to the top.
Or squeezed all the way up and spat out. Either way Scrat is a much cartoonier character than the others and more extreme things happen to him.
Other mistake: When the Pirates are arrested in Nineveh, another soldier walks up to Jonah and knocks him out with a fish. When this happens, Jonah is wearing the Cheese Curl hat. When he comes to on the Slap of No Return, he is wearing his turban again. Would the soldiers change his hat?
Continuity mistake: After Capt. Hook drops Jane into the water and Pan dives in to save her from the octopus, he begins to gloat. Looking at his scabbard there is no sword because he threw it at the mast to cut the rope. Next thing you know, the sword is back in the scabbard.