Other mistake: When Warren/Angel refuses the cure and spreads his wings, he is looking to the left of the screen at his father. In the reflection of Dr. Kavita Rao's glasses the shot of him is not reversed; he is still looking to the left of the screen when he should in fact be looking to the right. (00:33:00)
Other mistake: At the beginning of the credits, (of the version shown in cinemas) they have mis- spelled 'Starring', they put 'Strarring'
Other mistake: When Magneto is overlooking San Francisco Bay (just before lifting the Golden Gate Bridge), the scene was shot on a green screen, as whoever keyed in the sky cut off the very top of his head. What's more, it shows the characters in profile with the setting sun behind them, but they are not in silhouette. What light source in San Francisco is bright enough to outshine the sun?