Corrected entry: When Mr. Brooks leaves his house to go to his for the studio for the first time he is wearing his glasses, yet when you see him outside walking he isn't wearing them, and then they are back on him when he turns the lights on inside his studio. (00:07:25)
Corrected entry: In the scene where Demi Moore gets hit by a swinging body, her nose is bleeding for just a quick scene. All other subsequent shots of her show no blood at all.
Correction: I've had nosebleeds where a quick blow to the nose will break the blood vessel enough to allow blood to escape, but does not bleed continuously. A quick wipe of the nose, and it may be sore, but no more blood comes out.
Corrected entry: There is a scene where Mr. Brooks gets in his car (in the driver seat) and his alter-ego gets in the passenger seat. Although Mr. Brooks can imagine his alter-ego is getting in the car, there is no way that the alter-ego could physically open and close the passenger door - which is what he does. If there were people around, they would see a car door opening and closing with no-one there.
Correction: Brooks sees the door open and close, we as the audience sees the door open and close, but people that aren't aware of Brooks' alter ego wouldn't see it. In other words, the door doesn't open in "real life" but it does for Brooks, and us as the audience since we become aware of Brooks' psyche.
Correction: We also saw Brooks remove his glasses when driving in the dark earlier. It's possible that light reflecting off the lenses causes glare when the rest of the environment is dark, so it's easier to see without the glasses. That happened to me frequently when I wore my glasses. He could just have taken them off for walking outside and put them back on prior to entering the studio, as he would be putting the interior lights on.