When Jack is handcuffed to the pipe below decks, the elbow joint is a modern welded joint, not a bolted flange joint as in the rest of the ship. I'm sure this was done to allow Jack to move about with greater ease as the water level rose.

Throughout the film, Tony Stark's chest ring can be seen glowing through his shirt except for two occasions when it's suddenly off - after Loki escapes from the helicarrier, and when Loki and Tony Stark are talking in Stark tower.

When Katniss is being evaluated, she picks up one of four arrows and fires it at the target. when she tries again, she picks up another arrow, but the arrow that she shot is still there. After this happens, yet another arrow appears.

In the first close-up shot when the Prince's aide is complaining about the salmon-pink clothes the Queen has given him to wear, his collar is buttoned closed. In the next close-up shot it is open with silver hook and eyes visible. In the third close-up shot it is buttoned closed again.

When Oz is talking to Mia outside near the start, she puts her hands on her shoulders when she says "that's so cute!" In the next shot they're lowered, and she puts them on his shoulders again.

When the kids are reading the book about cinema, Hugo's right hand appears / disappears randomly next to the book between shots.

The first few projectiles fired on the destroyers by the aliens are taken out by a phalanx CIWS. However these systems use radar to track their targets, and the aliens have jammed all radar, so it shouldn't be working.

As Teddy goes to take a picture of the trio on his iPhone, he is on the iPhone's home screen. Though a shutter noise is heard, he never enters the camera app to take the photo.

During the sandstorm, when Ethan is run over by the car, its left side mirror breaks, but appears fixed in the brief opposite angle.

In the scene where Billy is having ice cream with his daughter, watch the can of whipped cream change even though it wasn't picked up.