(at around 14 mins) After Anne was fired she walked out of the building holding a box full of her stuff. While arguing with Eddie she dropped the box and a few things fell out. However, when she picked the box up nothing was on the ground.
(at around 1h 5 mins) When Eddie leaves his phone on the MNBN desk, the desk is in the penthouse of the building which is 48 storeys. When leaving the office building via the elevator the elevator banks distinctly indicate that he is on floor 8.
(at around 6 mins) The Ducati Scrambler has no mirror in the first scene. In the chase scene (at around 54 mins) there is one on the left side.
(at around 55 mins) A drone crashes into the back of a Chrysler sedan and explodes, but when the flames dissipate there is no damage to the body of the sedan (i.e., no impact damage on the trunk lid).
During the car/motorcycle chase. The SUVs keep crashing into things and each other, mostly head on. When the impacts happen, damage is shown to the headlights, grill, bumpers, and windshields. Each time the camera cuts back to them, they show no damage at all.
(at around 1h 12 mins) When Brock is in the MRI, the sound frequency emitted by the machine huts the symbiote. MRIs do not use sound frequencies. There is a loud knocking noise when a test is performed, but is not a sound that emits a high frequency. It is the equivalent of someone knocking loudly on a door. MRIs use high powered magnets when they perform their tests. An ultrasound, on the other hand, would probably produce the high frequency sound that would hurt the symbiote.
And, speaking of magnets, the room in which the MRI is installed has metal objects all over the place. You can not have metal objects in a room with an MRI installed, unless said objects are tightly fastened down. There have been deaths from metal being "sucked" into the machine with a patient being tested. A young boy was recently killed from a fire extinguisher being "sucked" into the machine at high velocity and striking the boy in the head.
And, speaking of magnets, the room in which the MRI is installed has metal objects all over the place. You can not have metal objects in a room with an MRI installed, unless said objects are tightly fastened down. There have been deaths from metal being "sucked" into the machine with a patient being tested. A young boy was recently killed from a fire extinguisher being "sucked" into the machine at high velocity and striking the boy in the head.
(at around 43 mins) Shortly after Eddie merges with the alien, he is at the restaurant he is very hungry and hot. He sits in the fish\lobster aquarium. Doing so no water is displaced\spilled as he jumps in.
(at around 46 mins) In the MRI lab, the device used to deliver sound to the test subject is a first generation Mackie Big Knob studio monitor controller (originally produced in 2005), with the model name on the top right corner covered with black tape. However, only a power cable is shown connected - there are no audio output cables connected to the controller, which would normally be seen anywhere on the rear from the centre "big knob" to the power connector on the right, including below the three volume controls beside the power cable.
During the human trials, the researchers happily claim the subjects "vitals are holding steady." The monitors read a pulse of 136, which is dangerously high, and oxygen saturation of 81%, which is dangerously low.
In Brock's apartment scene prior to the henchmen arriving, several Ralph's grocery bags are seen. There has never been a Ralph's in San Francisco.
(at around 1h 30 mins) At the end, when Eddie is walking to Mrs. Chen's store, it's daytime, but when he exits the store it's night time. Actually, when Eddie enters the store it's clearly dark outside. When he starts walking to the store it's right around sunset (judging by sky color and lighting of the buildings). If it took him 20-30 minutes to reach the store (which is reasonable, since he was walking slowly), it may well be dark.
When newly formed 'Venom' breaks out of the Life foundation (which looks like a hi-tech research facility) they don't know who stole the organism. Why not just check the security cam feed? Why waste time interrogating the doctor at all? However it is possible that they don't keep cameras around the facility. The facility is secret and doing some pretty unethical stuff. They intentionally don't have cameras hanging around recording all the illegal activity. Especially in the location they are testing humans. Or else Dr. Skirth wouldn't have needed Eddie to take the photos for evidence, just take the security camera footage.
(at around 2 mins) Some assume that the crash site is in Cebu, which is in the Philippines, not Malaysia. However, it's not Cebu, but Sibu, which is indeed in the Malaysian state of Sarawak. The map on the computer in the control center shows the states of Sabah and Sarawak, in east Malaysia. The medical technician actually speaks Malay.
The symbiotes at the lab are shown to reject and kill most hosts, yet Venom and Riot change hosts repeatedly throughout the film whenever they want or need to with no ill effects. Dr. Skirth explains that hosts must be compatible to survive, but the nature of this compatibility is never explained, so it can be intricate enough to explain all the host-symbiot interactions in the movie. Also, it appears that symbiotes can sense compatibility from afar, so they choose the hosts they need (the symbiotes in the lab aren't given a choice). It is also possible that Dr. Skirth was wrong and symbiotes can assimilate or kill a host at will. Indeed, Venom was killing Eddie at first simply because he was hungry. It is also possible that symbiotes learn from experience and become better at assimilation. Indeed, it seems that as time goes on more and more hosts survive in the lab experiments.
(at around 50 mins) Before the mercs knocked on Eddie's door Venom sensed them. When Anne was taking Eddie to the hospital later on in the movie (at around 1h 10 mins) Venom didn't sense the drone flying behind Anne's car. However, we don't know how Venom's senses work. It is possible that he senses living beings much better than machines. Besides, hearing approaching humans from a quiet apartment is much easier than hearing a drone from inside a moving car on a loud street.
Eddie wears a ring on his left forefinger. When he's watering his plant and when he's walking to Drake's rocket while talking to Venom there are a few shots where his ring is on his right forefinger. It's because the camera is mirrored. His hairstyle is different too.
(at around 46 mins) The African American test subject is strapped to an upright x-ray film holder and has a portable x-ray machine pointed at him, neither of which can do any of the imaging that shows up on the monitors. Same items are seen in the room during the first test subjects exposure session. These two items are not normally used together for diagnostic x-rays anyway.
(at around 53 mins) When Eddie is surrounded in his apartment and escapes out the window to another apartment below, he is shot at continuously and Venom creates a shield to stop the incoming bullets. When the shield dissipates, the bullets fall to the floor, creating a tinkling sound commonly associated with the sound of bullet casings hitting the floor, instead of the correct thud of heavier, lead bullets.
In the chase scene with the Ducati scrambler, it at certain times sounds like a real Ducati with a twin-cylinder engine. But then most of the time during the chase the sound is edited to a 4-cylinder bike.
(at around 33 mins) When Eddie is on the bridge deciding whether or not to call Dora, you can hear a single ring of his cell phone before he actually picks it up and calls her.
(at around 3 mins) The scenes with the Malaysian ambulance shows the vehicle driving on the right hand side of the road, and the steering wheel on the left-hand side of the vehicle. Malaysia drives on the left side of the road (like in the UK & Australia), and the steering wheel should be on the right-hand side of the vehicle.
(at around 3 mins) People's breath can be seen at the crash site that's supposed to be in Malaysia. It never gets cold enough there to see your breath.
(at around 4 mins) When the Malaysian EMT was walking towards a Chinese market from the crashed ambulance, autumn leaves could be seen at the roadside. Malaysia is a tropical country, there should not be any seasonal changes in even the place is at Sibu, Sarawak, Borneo island.
(at around 56 mins) During the chase scene, the security team leader says "Target is now East-bound on Grant" but Grant Avenue in San Francisco runs North/South not East/West.
When Eddie Brock is in the kitchen of his San Francisco apartment, the grocery bags on the counter are from Ralph's. Ralph's is a grocery chain from Southern California that does not have locations in the Bay Area.
(at around 1h 2 mins) After Dan calls Anne telling her that Eddie needs to be brought to the hospital, Anne tries calling Eddie. Eddie hangs up before taking the call, then Venom asks Eddie who Anne is. A few scenes before this, however, Venom told Eddie he knew everything about him. If this is correct, Venom would already know who Anne is.
The rejection issue plot-line makes more sense when considering the lab setting has the staff making the host choices. When the symbiotes change hosts repeatedly, they may be choosing ideally compatible hosts.
When a kid wants to ask Drake a question, Drake says Dr. Skirth will answer any questions. But then Drake leaves with Dr. Skirth.
At about 1hr27m in, during the aerial view of the city, going into the dialogue scene with Eddie and Annie, it is clearly not Eddie Brock saying the lines: "Thanks for sticking by me, Annie. Thanks for saving me." The voice sounds much like Dr. Dan Lewis.
(at around 1h 1 min) When Dan performs tests on Eddie, he calls Ann to get reach Eddie and also tells her what he found. This directly violates patient Dr./Patient confidentiality as regulated by the Health Privacy Information Act. Dan could lose his medical license if it was discovered he was sharing medical diagnosis information with someone other than the patient.