Star Trek

When Captain Robau enters the bridge of the Kelvin he is wearing his Star Fleet insignia. When he sits in his chair it is missing. It re-appears through all of his subsequent scenes.

The Twilight Saga: New Moon

After Bella awakes from the first nightmare, we see her Romeo and Juliet book on the pillow beside her. When Charlie brings in her presents the book is gone, but then reappears on the pillow between shots.

Terminator Salvation

The four-door Jeep Wrangler used in the movie wasn't made until 2007, three years after the date of Judgment Day as established in Terminator 3 (Saturday 24th July 2004).

Harry Potter and the Half-Blood Prince

When Harry is kneeling beside Dumbledore at the foot of the Astronomy Tower, Ginny joins Harry and holds him at his left side (viewer's right). In the last close-up of Professor Dumbledore's face, Harry is visible in the background with a space to his left and Ginny has suddenly gone. That same angle was shown before Ginny joined Harry.

Transformers: Revenge of the Fallen

When Sam is at the Frat party just after he has written the code on the table with cake, he goes and gets a drink. The glass is full, the camera cuts to the girl talking and then cuts back to Sam and the glass is nearly empty, cuts to the girl again and then back to Sam, with a full glass again.

Zombieland

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.

Angels & Demons

The Fontana dei Quattro Fiumi, where the fourth cardinal is taken to be executed, is nowhere near as deep as it's depicted in the film. In reality it's only little more than a foot deep.

Public Enemies

Early in the movie, during a bank robbery, there is an FDIC sign beside the teller. Dillinger's bank robberies were mostly in 1933, he was arrested in January 1934. The FDIC was not enacted until January 1934, making it impossible for the bank to have been insured by the FDIC during the 1933 robberies.

X-Men Origins: Wolverine

When the old couple who give Wolverine clothes are first driving towards their house, there is an aerial shot of them driving over a bridge. This is supposed to be set in Canada (where they drive on the right) but it was filmed in New Zealand (where they drive on the left). They are driving on the right but the arrow on the road is on the left side.

Bride Wars

When Emma goes to crash Liv's wedding ceremony, as she crashes through the glass doors you can see film crew reflected in the glass panes.

2012

As the heads of state decide to open the gates, we see the countdown timer in the background go from 14:40 remaining to 14:39. We cut to a different angle, and it's back up to 14:41.

Knowing

In the last couple of scenes, when John is driving through the city from the gas station, the back door of his truck is constantly changing from open to closed and to no door at all.

17 Again

On the bridge, when Mike topples into the water headfirst, the distinctive treads on the heels/soles of his shoes, as well as the light colored brand logo on the heels, are visible. After the newly transformed Mike appears at Ned's home wearing the same clothing, when Ned pulls the rug out from under Mike, his shoes' soles are completely different.

Paul Blart: Mall Cop

When Paul knocks the bad guy over in the sporting goods store, he falls flat on his back. The crash mat is visible right where he lands and is a different color to the surrounding tiles.

Coraline

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.

The most mistake-ridden movies of 2009