Plot hole: Throughout the film, anybody who speaks English uses Modern English, with either a British or French accent as appropriate. However, 1357 was solidly in the Middle English period. Although that language would not be utterly incomprehensible to modern-day travellers, neither would it be indistinguishable as it was in the film. The film specifically draws the viewer's attention to language at several points, making suspension of disbelief impossible. The French speak French, and very few of them speak English. There is a scene in which Andre is talking to Claire, and her lack of knowledge of modern idioms makes the conversation difficult; that should be true for all characters at all times. If the historical people were talking alone among themselves, I could accept that they're being "translated" for us. But they're talking directly to the modern travellers - it's too jarring.
Plot hole: When Bond and Tibbett break into the underground lab and find the device which drugs the racehorses, you can see that it has a large light emitting diode (LED) on the top of it. What possible use would that be, since the device is implanted in the horse's leg, and is supposed to be covert? (00:37:20)
Plot hole: The morning of the final battle, the sun rises behind the mission, silhouetting a sentry. When the ending credits roll, the sun sets behind the mission.
Plot hole: In one scene saboteurs rig the Concorde's cargo door to automatically open suddenly in flight, on the principle that the rapid decompression will cripple the airplane & cause it to crash. At the critical time the door does start to open, but jams and only opens very slightly. Minutes go by, with the ajar hatch allowing air to freely pass through. Then, suddenly, the door unjams, and the compartment is shown losing air pressure dangerously fast. Problem is, that since the door had been cracked open for several minutes, the air pressure would surely have gotten to equilibrium by that time. (01:32:45 - 01:36:30)
Plot hole: After the bird is hurt, Jimmy is shot several times and wounded very badly. Yet just seconds later, he is able to save the young boy, and mysteriously use many of his "crow powers" despite being hurt very badly.
Plot hole: When Cage is hiding the VX gas balls at the end by putting them in a drain you can see he is holding the loose ball, but then in an instant cut picks it up along with the chip.
Plot hole: The Hillbillies take a "short cut" to catch up with the guys after they are taken in by Burt Reynolds. However, the guys get a chance to sleep comfortably until morning before being confronted by them. (01:12:10)
Plot hole: The policeman survives a frontal crash into the hillbilly's truck at full speed without as much a scratch. (00:24:40)
Plot hole: When Martin decides to antagonize David by eating spinach, he eats it from his plate. When they both eat the spinach frantically, they each eat out of a large bowl. Where did the second large bowl come from, and why would there even be a second one if they only need enough for three people? (00:34:55)
Plot hole: The survivors find their way to the internet lounge to send out a message via email about the terrorist attack. The ship was upside down. All satellite dishes used to transmit over the internet were completely submerged in water. Even if there was power to the computers, they would not have been able to get a server connection let alone send out email.
Plot hole: After Blondie has "teamed up" with Angel Eyes, he hears a gunshot and says something like "Every gun sings its own tune", indicating that he's recognized the shot as being from Tuco's gun. But how did Tuco get his gun back? It certainly would have been confiscated when he entered the prison camp, and the chance that the guard on the train has that exact gun is extremely unlikely - he would most likely have had an officially issued sidearm. (02:02:52)
Suggested correction: There's a mistake in the question. It was Blondie who said that quote, not Angel Eyes. The question assumes Blondie was referring to the sound of the gunshots. It's more likely he was referring to the cadence of them. Tuco fired with a particular rhythm that Blondie came to recognise. Considered from this perspective it all makes sense.
Suggested correction: It's the type of gun Tuco likes that makes that particular sound.
Plot hole: When Tinkerbell tries to find Gruff in winter, she's seen flying with her wings out of her coat; in a later scene, Fawn flies too. After Tink finds Gruff, her wings disappear from underneath her coat. This is a plothole because of how the whole storyline of Secret of the Wings was that warm fairies can't fly in winter weather or their wings will tear.
Suggested correction: Yeah but at the end of Secret of the Wings, they find a way to let any fairy fly in winter.
Plot hole: So humanity in the future managed to solve time-travel, but is unable to develop armor-piercing, exploding ammunition? And it uses old, untrained civilians as soldiers to fire M16-16 and WW2 heavy machine gun ammunition at fast moving targets, instead of developing rapid-fire computer-targeted guns? The movie shows 0.5" ammunition (from said WW2-era machine gun) CAN take out the Aliens, so? (Not to mention flame-throwers, shown as effective but sparsely used, no tanks, etc).
Suggested correction: The rifles the civilians are equipped with aren't M-16s; they are modified BCM carbines "MK III" and "MK IV" with HERA Arms CQR furniture.
Plot hole: Zi Juan tells the rest of the group when they are in Shangri La that she will take the first watch at the entrance and guard against the emperor getting in. A few shots later, she then decides to have a conversation with her daughter nowhere near the entrance, and now with no-one guarding, means he gets in unchallenged.
Suggested correction: A character briefly leaving their watch to deliver important information as Zi Juan was doing isn't a mistake, and it's definitely not a plot hole, since it in no way contradicts the movie's logic or creates a hole in the narrative. At best, Zi Juan was being a little foolish leaving her watch, but a character being a little foolish isn't a "movie mistake." After all, people make foolish choices all the time in real life. Plus, as demonstrated by the movie, it doesn't really matter anyways - the Emperor's powers are back, so she wouldn't have been able to stop him even if she had kept watch.
Plot hole: There is supposed to be no power when the Dragonfly ship reaches the island, but the lights are still on. At first, I thought it was just a lighting trick, but you can see the lights are on in the tunnels.
Plot hole: James Bond shouldn't have gotten away at the end of the airport scene, where he steals an aeroplane and pretends to be a flying instructor. He had no wings with which to fly away, and he ended back up right outside the airport. So, the henchmen, who seemed to still be chasing him one shot before he parked, should have been right on him, waiting when he got out of the plane. (01:06:55)
Suggested correction: This is not necessarily true. He already got away from the cars chasing him, as they crashed. Any that were still pursuing him would have been blocked in the hangar. The other guys running after him were running on foot. Even while taxiing, the plane is faster than the men on foot. Once the plane is stopped, we don't see what happens next as it cuts to the next scene after the funny bit with the pilot. So the exact means of his escape or not is speculation.
Plot hole: When Don Luis escapes from his house in the black van he does a high-speed turn out the drive-way and the whole van slides sideways. A few minutes later when he is on the phone he turns to see the 2 dogs sitting behind him. If the dogs were in the van while it was sliding sideways they would have been thrown around the back of the van and would definitely have made some noise, so he would have known they were there.