Factual error: When Javert arrives in Paris to inform the Prefect that he has found Valjean, the government building displays the French Tricolour. This part of the film is set in 1823, during the Bourbon Restoration, so the flag should be the white, Bourbon flag.
Factual error: In the chapel sequence in which several young women are making their religious professions, the priest mispronounces the words "caelis," "sanctificetur," and "caelo." In the norms of ecclesiastical Latin the letter "c" when followed by the vowel "e" or the dipthong "ae" is always pronounced as the English "ch." (01:14:15)