Other: When Iron Man and Iron Monger are fighting, Iron Man catches the SUV, and you can see the family inside the car. Although the car is completely vertical, the hair of the people in the car seem to defy gravity.

Continuity: In the scene when Pepper is watching the television program about Stark Industries' stock troubles after Tony's press conference, notice she has a wireless headset in her left ear. When Tony calls her down to the lab, the camera flashes back to Pepper and the ear piece is gone.

Visible crew/equipment: In the extra footage after the credits, the reflection of the crew is visible in the picture frames around the apartment.

Continuity: At the party, when Stark goes to order a Martini and chats with the girl, the extras in the background keep changing position between shots.

Continuity: In Tony's workshop is a silver clock resting on a shelf with his model airplanes. At one point, this clock is stopped reading a little after midnight (a stopped clock is a common technique used by filmmakers to keep continuity problems to a minimum between shots,) and it is rational that Tony would display the clock for its artistic or sentimental value even if it was broken, but later the clock reads about ten past nine, showing that someone has changed the time.