Continuity mistake: Magneto straps Wolverine to the port side of a boat and then drops the boat on a warehouse. When Gambit is freeing Wolverine, Wolverine is suddenly on the starboard side of the boat. After Gambit frees Wolverine, they are both shown to be on the boat's port side.
00:17:00 - 00:18:00Serious B
Continuity mistake: When Mystique first impersonates Shard in order to fool Psylocke, both Mystique and the real Shard are missing the gun holster that is usually on top of Shard's right shoulder. When Pyslocke and Wolverine both state that they can see through Mystique's deception, the gun holster has suddenly appeared on Mystique's right shoulder.
Continuity mistake: The length of the chain attached to the collar of Archangel's guard dog varies. When the dog is first shown, the chain is only shown to be around three feet long. When the dog discovers Psylocke, it is able to run several feet towards her and away from the wall where it was chained up.