Character mistake: When Gaby's car becomes wedged between two buildings, she says, "Good plan. All we have to do is get over two twenty-foot walls and a minefield." While minimal backstory is given, I think it reasonable to assume that she has lived in what was East Germany all her life. It is thus highly unlikely that she would express a measurement in English units (being bilingual doesn't mean you automatically convert measurements). She would have said something like "six meters."
Character mistake: Lt Col Van Patten's ribbons are out of order.
Character mistake: When writing in his ledger trying to reach 1 million oysters shucked, Adam's numbers do not add up. After 998,246 the next entry is 996,691 followed by 1 million. Did he mysteriously un-shuck 1,555 oysters?
Character mistake: When in the car both are talking about a scar on his back. He is telling her he was in Serbia chasing a man all over the tundra. Mistakenly thinking of Siberia instead. (00:41:13)
Character mistake: Ben convinces Becky to let him work with her using the line he heard from Jules' mother, but he says it wrong; she said that women who sleep less than 7 hours per night are 38% more likely to gain weight, and De Niro says that they gain 38% more weight - kind of a big difference. (01:02:45)
Character mistake: When the 3 boys and Rogers are trying to recruit scouts, they pledge to Rogers and Carter raises his left hand but in the next shot he has his right hand raised. (00:09:05)
Character mistake: In the Swedish version, Riley's first name is changed to Jenny. However, in the scene where Joy, Sadness, and Bing Bong are inside the soundstage of Dream Productions, the director can be heard calling Riley by her original name twice. (00:52:40 - 00:53:40)
Character mistake: When confronted by bears along the trail, Bryson identifies them as "Grizzly Bears", but the only bears that exist along the Appalachian trail are black bears. Grizzly are only in the Mountain states like Montana and Wyoming, and Alaska.