(at around 8 mins) The beard of Chadwick Boseman (T'Challa) changes in length from take to take. This is a consistency error that continues throughout the movie.
Shuri and Nakia are in the lab one minute while the battle is going on outside In the next scene they are outside ready to join the fight. At some point they change clothes and Shuri puts on some "war paint" type make up. Shuri's hair style completely changes as well. If they were in that much of a hurry to fight, they wouldn't have had time to make all those changes.
(at around 57 mins) When Everett K. Ross enters the interrogation room, he has the listening device on his left shoulder. When he leaves the interrogation room, it has vanished. But when the scene cuts to a different camera angle, the listening device can be seen again, though it is out of focus.
Throughout the challenge ceremony, Shuri is on her mother's right (left side of the screen).When T'Challa leans back in his clench, his upside-down view shows Shuri on her left (still left side of the screen!). The image was flipped upside down rather than rotated 180 degrees.
The overhead ship in daylight casts inconsistent shadows, changing from shot to shot.
(at around 1h 12 mins) Killmonger is said to have "graduated from Annapolis at 19". Annapolis refers to the United States Naval Academy in Annapolis, Maryland. They do not allow anyone younger than 17 to enroll, nor can one graduate early due to its rigid four-year academic program for its midshipmen.
(at around 2h 5 mins) When T'Challa is addressing the UN, a Welsh flag can be seen among the other flags in the background. As a part of the United Kingdom, Wales doesn't have UN membership in its own right, so this flag would not be displayed.
(at around 15 mins) None of the items in the London museum African exhibit have any labels indicating item type or tribe affiliation. Every museum would have that in their exhibits.
(at around 19 mins) The trolley is loaded onto the ambulance in the raised position. The mounting mechanism will not lock the trolley in place unless it is in its lowest position. As soon as the ambulance drove off - at speed - the trolley would have rolled all over the place.
(at around 1h 16 mins) One Wakandan subtitle has a misspelled word: "descendant" appears as "descendent".
The opening sequence showing the meteorite impacting the Earth shows the modern globe, even though this strike took place millions of years ago. The fact is that the contiguous "pangea" super continent began to drift apart approximately 280 million years ago. Australopithecus (the "Lucy" protohuman) lived some three million years ago - which was only about 1.4 percent of that time. One would not detect an overtly noticeable difference in drift over such a relatively brief period of time.
(at around 24 mins) Whem M'Baku challenges T'Challa he refers to the blessings of Hanuman, the monkey god. When the Queen of King Ram (of India) was kidnapped a monkey was found in the forest with her scarf, indicating a route that pointed to the the King of Ceylon (Sri Lanka) as the kidnapper. By saving the Queen the monkey was given the name Hanuman. Hanuman is not the name of an African monkey god, but of India. However, Hinduism is practiced in various parts of Africa, so it's very possible that the Jabaris picked up on various foreign theologies since seceding from Wakanda.
At the end of the museum sequence in London, an ambulance drives away. The audio includes a North American ambulance siren (long, sliding pitch change) instead of a British ambulance siren (alternating short high and low pitch tones, originally created mechanically using a type of bellows). This is not a goof, as many sirens in the U.K. are now American-made.
During the first duel for the throne, Zuri's bald cap is visible - it splits from his head right above and between his eyebrows.
(at around 1h 28 mins) When Killmonger picks up the woman in a choke hold, she is initially squirming around in the air. When the camera cuts back to Killmonger, the woman is motionless - either she accidentally stopped squirming around for that shot (continuity mistake), or he switched to holding up a dummy instead.
(at around 39 mins) When Shuri gives T'challa the new shoes (called sneakers), she mentions that they absorb sound & allow silent footsteps, which T'challa demonstrates. Later in the film (at around 52 mins), T'challa runs up a ramp wearing the sneakers... accompanied by the sound of footsteps.
(at around 57 mins) When Ulysses Klaue is being interrogated by Everett Ross, Klaue is heard to continue speaking whilst the camera is shown outside the interrogation room, with the camera focused on T'Challa. When T'Challa begins to walk, Klaue can be seen behind him, and whilst Klaue can be heard still talking, his lips aren't moving within the interrogation room in the background.
(at around 1h) With all the advanced Wakandan technology and medicine, and the accepted policy being to keep it all secret from outsiders, there is no reason for Shuri to even let Agent Ross regain consciousness while in the country, let alone spill any secrets once he does. The logical thing would have been to keep him sedated, tell him nothing and wake him up outside of Wakanda.
The reasons given for not sharing the advanced technology with the rest of the world for many centuries are insufficient. To be able to relieve suffering and not to do so is immoral at the very least. To say that the technology might have fallen into the wrong hands and be misused is no good reason. After all, the Wakandians are humans too and appear equally susceptible to the same emotions and foibles as the rest of us and they seem fine with it.