Continuity mistake: In "Enter: Naruto Uzumaki!" During the confrontation scene with Naruto, Iruka and Mizuki, watch the shoulder of Iruka's vest. First, it's pinned to the wall behind him after Mizuki first attacks. When Iruka first yells at Mizuki not to tell Naruto the truth about his past, his vest is free from being pinned, yet when he yells at Mizuki the third time to stop, his vest is again pinned to the wall and Iruka rips the shoulder of his vest out from the kunai that pinned it there.
Continuity mistake: At the beginning when the Stone faces, of the past and present Hokage, are shown from a distance. The two on the right is looking straight ahead and the one on the far left is looking to the left. But when a close up of the heads are shown, the two on the right are looking to the right and the one on the left is looking straight ahead.