Early in the movie, Mr. Bennet is sitting in his study smoking a pipe, when Mrs. Bennet and his daughters return from the village. In anticipation of their arrival, Mr. Bennet puts his pipe into the rack with other pipes. Yet, when Mrs. Bennet enters the room, he is seen smoking the pipe.
When their cousin Collins is expected to dinner, the butler comes in to light the candles. The mother asks about Collins, and when the sot returns to the butler, all the candles are lit.
Traffic in the film is shown driving on the right. However, traffic in England drives on the left.
(at around 17 mins) In the first ball scene, right after Elizabeth says to Jane, "My goodness, he does have an air about him.", the camera pans onto the dancers. When the women curtsy, the fourth girl from the camera almost tips over and shoots a worried glance toward the director.
Mrs. Bennet is seen steaming open the letter to Jane from Caroline Bingley. The envelope is a modern-day, gummed envelope fit for stationery letters. In 1815, the year the film takes place, letters would have been folded in and sealed with a wax seal. Gummed envelopes would not be invented for another 100 years.
(at around 1h 18 mins) Elizabeth Bennet plays the piano for Lady Catherine and Mr. Darcy. She plays "On wings of song" by Felix Mendelssohn, which he composed in 1835 as a setting of a poem by Heine. It was published in 1837 as the second of "Six Songs", Op. 34. However, Jane Austen wrote and revised her novel "Pride and Prejudice" between 1796 and 1812.
At one point, Mr. Darcy suggests to Elizabeth that they should "call it quits". There is no recorded instance of this expression before 1851.
Although the film is apparently set in the time of the original book - the 1810s - the costumes are in the style of the 1830s.
At the dance in Meryton, George Wickham remarks "Ah, polka mazurka!" However, the dance music that is playing and continues to play is in triple time, typical of a waltz. The polka is invariably in 2-4 time.