Visible crew/equipment: When we see the band playing in Pussfeller's club, the camera shadow can be seen moving over the bassist's jacket. (00:30:40)
Continuity mistake: When the freelance photographer is sitting down with Bond, the strap is around her neck, after the cut to a close up of her, the strap is gone. Then they show Bond take the strap off her neck. (00:31:35)
Continuity mistake: When Quarrel gets cut by the broken flash bulb, he has a lot of blood on his face and the rag. The next scene he's fine with no blood. (00:32:45)
Visible crew/equipment: When professor Dent drives to the dock after meeting James Bond for the first time, you can see the reflection of two camera lights in the side of the car as it pulls into the dock. (00:36:20)
Continuity mistake: When Dent walks into the room to be questioned by Dr. No we don't see the table with the spider cage in the first side shot but Dent only walks a few feet from the chair, and suddenly there's a table. (00:38:00)
Plot hole: It's assumed that Dr. No had Professor Dent slip the spider into Bond's hotel room that night but if it were that easy to do that then why not just hide an assassin in the room to begin with. Someone had to be in the room to tamper with Bond's briefcase, the closet, and possibly the bottle of liquor so just hide an assassin instead of waiting for the spider to kill Bond. (00:40:00)
Revealing mistake: When James Bond has a spider on his arm, one can see he's under a glass plate, and the spider on top of the plate. (00:41:55)
Continuity mistake: When the spider crawls up Bond's arm, and we see the spider in close-up, they are using a stand-in with much more muscular arms than Sean Connery. (00:42:00)
Continuity mistake: When Bond gets directions to Miss Taro's house, her instructions to Bond conclude with "Follow the road up the hill, down the other side, and two miles further on, on the left Magenta Drive, 2391," but when Bond is in her house later on, while calling for a taxi, the house number changes and he gives it as "2171 Magenta Drive". Miss Taro even nods to confirm it. (00:47:30 - 00:51:20)
Audio problem: When Bond is involved in a high-speed chase on the way to Miss Taro's house, his wheels are squealing like crazy, but he's on a dirt road. (00:48:10)
Revealing mistake: The second car chase is made with the help from a greenscreen. The car's movements as seen on the background doesn't always correspond with Bond's steering and the following car is sometimes too close to the screen. (00:48:10)
Continuity mistake: During the car chase, on the way to Miss Taro's house, we can see the same shot of the cars at the turn three times. (00:48:15)
Continuity mistake: During the car scene, the black car rams into Bond. Then the camera cuts and the black car is about 5 feet behind Bond without any time to have slowed down. (00:48:45)
Continuity mistake: The hearse that was involved in Strangways' death and later chases Bond is a 1937 or 1938 LaSalle, with the pod-style headlights mounted on stalks on either side of the radiator. The car that drives off the cliff and explodes is a later model car, with the headlights mounted flush into the fenders. It is very easy to spot while the burning car is rolling down the side of the cliff. (00:48:50)
Visible crew/equipment: The camera's shadow is visible on the ground as the car goes off the cliff in the car chase when Bond is headed to Miss Taro's house. (00:48:55)
Revealing mistake: As the hearse goes over the cliff, it's clear that there is no driver in the car. (00:49:20)
Continuity mistake: When Bond goes to Miss Taro's house, as he enters, one of the blinds is turned on the door, but they were all straight before. (00:49:50)
Continuity mistake: Bond sits down by a table, puts some cards down and pulls his gun out. He's wearing a tie, but when we see a close-up of him screwing on the silencer, his tie disappears. (00:54:40)
Factual error: When Professor Dent tries to shoot Bond at Miss Taro's and Bond is waiting for him in the darkened room, the 'Walther PPK' that Bond is busily screwing the silencer onto, at the beginning of the scene, does not have an external hammer, and is therefore not a Walther at all. It's a Browning 1910 .32 calibre. (00:55:10 - 00:56:35)
Suggested correction: Correct to say it's not a PPK, but it's not a Browning either - in a close up one can see the Beretta logo on the grip.
First off, it is certainly not a Beretta. That's not the Beretta logo (3 arrows), but it's the Fabrique Nationale logo (stylized FN). Plus the Beretta has an external hammer and the gun in question does not. It is indeed a Browning 1910 (which is manufactured by Fabrique Nationale. Finally, it is not necessary to submit a correction for mistakes that are accurate but have one or two words wrong (not that this mistake had any words wrong).
Continuity mistake: When Bond turns on the lights after Professor Dent has arrived, his cards on the table have been messed up - compared to when he put the cards down five seconds earlier. (00:55:10)