When Max is going to get K.W. just prior to the Dirt Clod War, his hood is down. When he returns to Carol and Douglas, (just prior to being hit with a dirt clod) his hood is up.

After Wolverine arrives at 3 Mile Island he approaches through a thick fog. Above him are a series of conveyor belts that are used at a coal power plant, not a nuclear plant such as 3 Mile Island. The belts are unique to coal mines and coal power plants, and would not be found at a nuclear power plant. The filmmakers obviously couldn't film on the site of a nuclear plant, so filmed on a coal plant to fill in.

In the scene when Katie has a nightmare approximately 33 minutes into the movie, Katie wakes up, and the time is posted in the right corner of the "shot". When Micah picks up the camera the time disappears, and then reappears when he puts the camera back on the dresser.

We see many people running from the alien robot on the bridge. We then see Ginormica, and behind her the people have disappeared.

After trying to get his balloon back, Carl Jr. falls and breaks his arm. The ambulance that picks him up has a modern-day electronic siren, when in the 30's it would be a mechanical siren and would be much smaller.

Rham attempts to give CPR to Shaun San Dena after the encounter with the Lamia. He uses completely wrong hand positioning, would more likely break her collarbone than stimulate her heart, and does the CPR for all of about 10 seconds, which would be useless. There's evidence his character was trained in CPR, as he listens for breath and watches for chest rising properly, so it is not likely he was just making it up as he went along. A person trained in CPR would at least put their hands in the right place. He was not just a couple of inches off, but not even close to where the hands should be placed. Also, CPR must be done continuously until medical aid arrives, not for 10 seconds.

During the "nude" scene on the beach, when Shane is asked to drop his drawers, he wears shorts initially, but then in a subsequent shot right before the "reveal", he is wearing pants.

When Langdon first has an audience with the Camerlengo, you can quite easily see foundation on the Camerlengo's collar. This skin coloured compact is the base of any film makeup and often rubs off onto white collars if not checked.

After Tallahassee and Columbus find the yellow vehicle, Tallahassee paints the number "3" on the sides. The style that the "3" is painted in changes throughout the movie.

During Coraline's first meal with her Other Mother and Father, just before Coraline says "I'm real thirsty." there are two drinking glasses to her right, the one she uses a couple seconds later and a smaller one. After the cut to the chandelier lowering, it goes back to Coraline and the smaller glass has completely vanished.