Factual errors: Miranda, a professional decorator, recommends a "17th century grand piano" for Stuart's B&B. The piano is an 18th century invention.
Crew or equipment visible: Film crew reflected in the window of the trolley car with Mrs. Doubtfire and kids on board as it drives by.
Continuity: When Mrs. Sellner is inspecting Daniel's apartment and he is in the kitchen, Mrs. Doubtfire's wig mysteriously changes from frayed to perfectly shaped.
Crew or equipment visible: When Daniel/Mrs. Doubtfire is in the kitchen looking in the fridge, the cameraman is reflected in the frying pan that he picks up.
Continuity: As the family approach the entrance to the swimming pool enclosure, the same two bikini-clad girls cross their path twice between shots.
Crew or equipment visible: A catapulting device used to force the styrofoam head to cause Mrs. Doubtfire's mask to fall off into the alley is visible at the base of the head.
Crew or equipment visible: When 'Stu' is talking to his friend in the bar at the pool, the reflection of the camera can be seen in the vase behind them.
Continuity: The first time Daniel emerges from the ladies room and asks the maitre d' for a menu, the knot of his tie is skewed to his left. In the next shot, when he reaches Mr. Lundy's table, it has been straightened.
Continuity: When Mrs. Doubtfire throws the remote for the television in the fish tank, the television has turned itself off, yet no one has turned it off.
Continuity: When Mrs. Doubtfire and Miranda are unloading a paper bag of groceries, Mrs. Doubtfire pulls out a small bag of tomatoes. In the next shot, she pulls out the same bag of vegetables and carries them to the refrigerator to place into the crisper.
Continuity: When Mrs. Doubtfire serves tea to the Inspector who visits, her home, the amount of tea in the Inspector's cup changes after the camera cuts away to show the melting cake fall off Mrs. Doubtfire's face into the cup.
Continuity: When Mrs. Doubtfire throws the lime at Stu, it cuts to Stu getting hit in the head. When it cuts back to Mrs. Doubtfire, the same lime is clearly at the top of the dish. It then cuts back to Stu, and when it cuts back to Mrs. Doubtfire sitting down, the lime is now gone again.
Continuity: In the birthday party scene at the beginning, Daniel sees Miranda and jumps off the table. When he takes his cap off, his hair is flattened down. After Miranda pulls the plug from the outlet, the next shot is of Daniel with his hair neatly combed.
Errors made by characters (possibly deliberate errors by the filmmakers): Mrs Doubtfire is regularly distinguished by her accent throughout the movie as being English, yet she speaks with a Scottish accent, not English.
Continuity: When Mrs. Doubtfire goes into the kitchen, she closes a regular door in the middle of the hall. Throughout the rest of this scene, there are two swinging doors to the kitchen, and they are located at the other end of the hall.
Errors made by characters (possibly deliberate errors by the filmmakers): When Mrs Doubtfire gets her own children's TV show at the end, she asks one of the puppet characters if he knows anything about England. The reply is 'I only know that it's an island', which isn't true. Britain is an island, not England.
Errors made by characters (possibly deliberate errors by the filmmakers): When Mrs Doubtfire gets her own children's TV show at the end, she asks the puppet, "Do you know what language they speak in England", and the puppet says "Pakistani?". Pakistani is not a language, the national language of Pakistan is Urdu (among other provincial languages like Punjabi, Sindhi, Pushto, etc..) The word Pakistani only refers to people of Pakistan, there is no language by the name of Pakistani.
Continuity: During the sequence where Daniel is calling Miranda with horrible "potential nannies", he makes one call while in a bathtub. Between shots where it cuts between him and Miranda, the bubbles on his body change position.
Continuity: After Chris and Lydia learn that Mrs. Doubtfire is a male, Lydia threatens "her" by picking up a tennis racket as a weapon. However, the next time Lydia is shown in a full-body shot, she is no longer holding the tennis racket.
Continuity: Daniel asks Miranda for the nanny advertisement and consequently changes the two listed telephone numbers. When Daniel is calling Miranda posing as the fake nannies, he calls three different numbers - home, work, and mobile.
Continuity: The montage of different character makeups should have been shown before Daniel created Mrs. Doubtfire, not after. The way it appears, several different makeups were applied - none of which would've matched the "voice/character" that Daniel came up with.
Revealing mistakes: When Daniel is putting in his false teeth, you can see that some lipstick got on of his teeth.
Errors made by characters (possibly deliberate errors by the filmmakers): After Mrs. Doubtfire lights her blouse on fire over the stove, she says "first day as a woman and I'm getting hot flashes" - although it is not his first day.