Continuity: Daphne's bra strap shows when she is speaking to Ian Wallace after their "great day", but in the next shot it has disappeared, though she never moved her arms.
Continuity: Henry and Daphne repeatedly switch positions between shots as they dance.
Continuity: When Ian first comes to Dashwood Manor and is arguing with the security guard about having an appointment to see Daphne, the size of the gap in between 2 of the gate's metal bars changes from wide during shots of Ian speaking to very, very thin during shots of the guard speaking.
Continuity: When Daphne is making herself over as a "proper young lady" you see her removing her nail polish, and later in the montage she's wearing it again.
Factual errors: When Daphne meets Ian, she asks if he's playing a Gibson J200 guitar, and he replies affirmatively. We never get a complete shot of the guitar, but we can see that it's a cutaway model - the Gibson J200 does not have a cutaway.
Errors in geography: US ringer style used on a British phones.
Anachronisms: The registration number of the taxi the young Libby leaves in is, at first, CYP 44V - when her bags are thrown in. This is recycled footage from shots of the same vehicle (CYP 44V) which we see the older Libby and daughter Daphne leave in towards the end of the film. Additionally, as the younger Libby leaves, after her bags are thrown in, the registration number changes to MMX 902L (a vehicle seven or eight years older).
Continuity: At breakfast, Daphne's hands repeatedly change position between shots.
Factual errors: Those in line to the throne cannot run for office in the UK.
Continuity: When Henry arrives at his press conference to withdraw his candidacy, Clarissa is wearing a solid brown barrette on the back of her head. After Henry punches Alistair in the face and Clarissa is kneeling over him, she is wearing a different barrette.
Factual errors: HM The Queen does not issue invitations only commands.
Factual errors: Along with the Queen, the Prince of Wales does not issue invitations but commands. Therefore, Lord Dashwood and his household would not be invited to the Royal Dress Show by the Prince of Wales but they would be commanded by His Royal Highness the Prince of Wales of attend the Royal Dress Show.
Factual errors: In the Invitation inviting Daphne to Peach and Pear Orwood's Coming Out Ball, the invitation reads "Miss Peach and Pear Orwood invites...” whereas an actual British society invitation would read "the Misses Peach and Pear Orwood invite...”
Continuity: When Glynnis is on the phone at breakfast she takes out her earring while on the phone. When she hangs up the phone the missing earring jumps from the left ear to the right ear.
Continuity: When Daphne climbs the wall of her father's house, the guidebook she was holding disappears. When she arrives at the wall it's in her hands and when she starts climbing, the book is gone.
Continuity: Every time Daphne leaves the booth she tries on clothes in, she never had the clothes she took off though she pays for the ones she has on.
Miscellaneous: In the photo montage of Daphne's emergence into society, "auction" on one of the headlines is spelled "aution".
Factual errors: Lord Dashwood is supposed to have met the mom while he was serving as a United States Peace Corps volunteer. As a British citizen, he is ineligible for Peace Corps service. Only Americans can serve in the US Peace Corps.
Factual errors: Henry's mother is the Countess of Wickham and her husband is dead, which means Henry is the new Earl of Wickham. He would be known as Lord Wickham, not as Lord Henry Dashwood.
Continuity: Daphne's bedroom is obviously not part of the house we see from the exterior. Daphne's room's interior shows it as a corner room (a window is on the long wall) with a bay window. But the Dashwood house is a flat-front, and When she and Glynis and Clarissa talk to Lord Dashwood out their windows, Daphne is supposedly in a room in between the other two, with a single French window opening onto a balcony.
Audio/visual unsynchronized: When Peach and Pear meet the twin boys when they're talking to Clarissa, they wave and say "tood-a-loo," but their lips do not move.
Errors made by characters (possibly deliberate errors by the filmmakers): In front of the portrait of his ancestor, Henry tells Daphne that Field Marshal Bingley Dashwood lost an arm at the Battle of the Nile. Field Marshal is the highest rank in the British army, but the Battle of the Nile was a naval engagement.
Factual errors: Lord Orwood claims that the chandelier was given by Napoleon to Josephine after the Battle of Borodino. The Battle of Borodino took place in 1812. Napoleon had divorced Josephine in 1809. He would have given the chandelier to his wife Marie Louise, whom he married in 1810.
Audio/visual unsynchronized: When Daphne is being sprayed by the shower head before they go to the Royal Dress Show, she is screaming but her lips are not moving.
Revealing mistakes: In the magazine montage one headline is misspelled "Chelsea Charity Aution".
Factual errors: When Daphine is riding in the number 8 bus in London it says "Trafalger Square" in the front. The actual number 8 bus does not stop at or near Trafalgar Square.