Robin is wearing a long white dress when they crash. She changes into floral shorts and a tank shirt when she and Quinn go looking for fresh water. After he gets the snake out of her pants in the water, they cut to next scene where they are back to the beach where the plane is. Robin is looking for fresh clothes in her suitcase and the shorts and tank shirt she was just wearing (which had gotten dirty and wet) are in her suitcase folded and clean, and Robin is changing out of the white dress she had already changed out of.
After Robin crashes the plane, the propeller is sheared off. After she and Quinn are pulled from the wreckage, the propeller is undamaged.
During the scene when Robin inflates the raft inside the plane the plane's flaps are in the full down position, but when Quin goes around the plane to talk to Robin with her face pressed against the window the plane's flaps are now in the full up position.
When the pirates' gunboat is attacking the plane, it is initially shown moving towards the beach at some speed. When the plane takes off, however, the boat is seen to be perfectly still with no visible wake near it.
Near the end, the injury on Robin's forehead seems to get worse between shots.
When flying in the storm the cockpit is lit inside. During poor visibility conditions and especially at night the cockpit should be kept dark.
The registration of French aircraft starts with "F" (which is correct in the movie) but includes only letters. Quinn's airplane has only numbers following the "F".
The plane crashes on the beach and remains there for several days. Yet, there is no sign of tide in all that time, the level of the water is always the same.
Having got the floats down to his wrecked plane Ford and Anne proceed to fasten them to lengths of Bamboo and to the plane with endless lengths of rope. A small amount of rope might have been in the plane but not the amount they use.
Steel drums can be heard in the opening and closing music which are Caribbean Island, specifically Bahamian, instruments not South Pacific. In addition, the music itself is definitely Caribbean Island music, not South Pacific.
The crashed Japanese plane they find has Chinese characters written on it.
When Robin and Frank first arrive at Macatea there is a beautiful view down the beach. This is exactly the same shot (including the tourists, furniture, clothing) that appears in the brochure Frank showed her in the restaurant in New York.
When Robin lands Quinn's plane on the beach, the bodies shown in the cockpit as it hits the water are obviously dummies.
Danny Trejo is at the controls of the Zodiac from the launch right up until it hits the beach. The actual stunt helmsman can be seen as it makes landfall. And he is the only one to exit the boat to the left and rear to minimize his exposure to the camera; the other two jump at the cameras and the beach.
Up to the scene when the leading pirate grabs Robin from behind, his pants are brown. But in the next chase scene, when they roll down the woods and up to the jump from the cliff, his pants are perfectly white.
After Quinn is dragged down the waterfall, he says, "I'm
fine." But his mouth movements don't match the words. He also says something about it being her turn, which is also not synchronized with the audio. The mouth movements he is making for both sentences are simply him drawing breath.
When the pirates show up and Quinn hits one with a stick the audio doesn't match up during the shot.
The band singer in the island bar.
Crew visible in Robin's sunglasses at the airport.
While overlooking the coastline high atop a cliff, Quinn is talking to Robin and you can see a tour helicopter flying behind him. The coastline they are overlooking is the Napali Coast which is a popular destination for tour helicopters on the Island of Kauai, Hawaii
Peacocks are not found in the South Pacific.
Robin and Frank are seen arriving and departing Macatea on Aloha Airlines, but the airline never operated anywhere near Tahiti. Before ceasing passenger operations in 2008, it only flew between the Hawaiian Islands, the west coast of the US and Canada, and one weekly round trip to Christmas Island in the Gilberts.
After discovering the Japanese float plane, Robin is awakened to the sound of Quinn sawing the floats off the plane. He is using an apparently new hacksaw, which he did not bring with him. Did he return to the crash site which was several miles away? Or did he find one inside the float plane? If indeed it was inside the float plane, the blade would have rusted through after 40 years in the jungle.
When Quinn is giving Robin her money back, he rips the fourth $100 bill in half, instead of giving her $50. Ripped money has to be repaired by either taping the ripped pieces together, or by going to the bank and having it replaced with the same number as the original bill.
Quinn takes some of Robin's medicine. It is illegal under federal law to take medicine that has been prescribed if any person other than the person named on the bottle takes it.