Continuity mistake: In the first scene where we see David Helfgott, there's a mark on his ring finger, probably made by a wedding ring. In that scene David isn't married.
Continuity mistake: Near the beginning, when Val tells Armand he is going to get married, Armand drinks his whole glass of white wine. But in the very next shot where Armand stands to get another glass of wine, you see that the glass is almost half full.
Continuity mistake: When Miranda Richardson is sitting on her bed after being threatened by Jennifer Jason Leigh, Miranda's blue dressing gown is pulled up on her shoulder. In the next shot it has slipped down. It carries on like that for a few shots.
Continuity mistake: In the scene where Faye and T.B. Player burst into the appliance store to announce the song was on the radio, watch the blue car behind them. It moves forward twice, depending on the camera shot.