Character mistake: After the robots first attack New York City, a series of newspapers is shown. One of the headlines in the French one reads "La Tour Eiffeil est détruite". The proper spelling is "Eiffel" (00:15:55)
Continuity mistake: When Joseph and Polly enter the Ark, we see the door close behind them, the countdown coming to zero. The Mysterious Woman, at the time, is out cold, or at least a dozen meters behind them. Yet, she finds her way onboard the Ark somehow.
Trivia: When Joe is going to shoot the bomb on the robot's legs, you can see King Kong climbing on the Empire State building in the background. (00:14:15)
Question: Roughly what percent of this movie was actually real as opposed to CGI?
Chosen answer: About 95% is CGI. The only real part of the movie was the actors themselves (and small objects they handle), with the exception of Dr. Totenkopf, portrayed using archive footage of Laurence Olivier. Everything else was CGI.
Guy