When Tobias Hankel is typing in a website URL at around 23 minutes, the "browser" is actually an image in Photoshop. Photoshop's toolbar is visible to the left, and the large text indicator line, which extends above and beyond the text field, is a strong give-away.
When Gideon is being shown the original hand-colored Audubon etching of The Mockingbird (about 6 minutes in), the overlay incorrectly IDs the place as the "Smithsonian Institute." This is a common mistake; the complex of museums in Washington, DC, is the Smithsonian Institution.
At the very beginning, Tobias dialed 911, but you only hear two tones on the phone, which indicates he only dialed two numbers.