The Prince's speech during the funeral includes the line "I...too have lost a brace (i.e. a pair) of kinsmen." In this version, only one of the Prince's kinsmen (i.e. Mercutio) is killed. Count Paris, the Prince's cousin who is slain by Romeo in the play, is left very much alive in this version. This may indicate that the film was trimmed before release, and that the death of Paris was actually cut. The souvenir program given out when the film first played in theatres indicates that plans were originally made for Paris to be killed by Romeo, just as in the original play (there is a reference to "the graveyard where Romeo slays Paris").
When Romeo and Benvolio arrive at the Capulet's ball, Benvolios's love interest is seen standing in one place. In the next shot she's seen walking around and in the next shot she is seen standing in the same place she was before she began walking around.
In the crypt, at the end of the movie, Juliet's hands are in several different positions during Romeo's speech.
Around 02:14:26, we can see both characters with their hands posed in different ways. Around 02:15:47, both characters have hands posed the same way.
Around 02:04:57, we can see Romeo pulls the shroud up Juliet's knees. On the next shot (around 02:05:43), the shroud is just under Juliet's hands.
When Romeo and Juliet's bodies are laid out in front of the ruler, Romeo takes a deep breath.
During the close-up of Juliet in the scene where the Capulets find Juliet "dead" in her bedchamber, she is visibly breathing.
When Romeo is talking to Tybalt's dead body, Tybalt is visibly breathing.
In the chapel, when Juliet wakes up to find Romeo dead, she leans over him in mourning, though he is visibly breathing.
When the minstrel begins his song, a pipe player, a violin player and lute player are seen playing behind him (all miming badly). There is no violin or flute on the soundtrack at that point; only what sounds like a harp.
Around 01:56:13, we can see flute players (all mimicking badly), while we hear choirboys on the soundtrack.
Following the initial brawl and the prince's admonishment trumpet flourishes are heard but both trumpeters are seen with their horns held vertical against their thighs, not blowing them at all.
Towards the start of the movie, a man is having his arm bandaged. As soon as the piece of narrative for the character stops, she just leaves it not tucking it in in any way at all and he gets up as if she had finished, leaving bandage just hanging to unravel as he stands up.