Audio problem: After the engines of the stealth boat are stopped, Bond is walking around with a sub machine gun and his pistol. His pistol has a large silencer/suppressor on it. A man tries to ambush him on a later and Bond turns and fires his pistol at him several times. Despite the suppressor, the gun makes the full sound of the shots. (01:45:14)
Audio problem: In the scene where James Bond and Wai Lin are introduced to Mr. Carver and Mr. Stamper, Carver says that when Stamper removes Bond's heart, " there should be just enough time for him to watch it stop beating". While saying this, he turns to walk towards his desk and his lips don't move at all. His quote was obviously added in post-production.
Answer: It's getting dark by this point - Bond and Wai Lin are dressed in black in a dark coloured boat. Anyone looking out of the window would be looking down towards them - they wouldn't be able to pick them out against the sea.
Tailkinker