The level of champagne in Sandrine's glass varies from shot to shot on the first night in Nathalie's apartment.
The end of the movie is supposed to take place after Nathalie is released from prison, several years after the main plot takes place. Yet the movies advertised on the advertisement pillar in the background (Spot (2001), Amori in città... e tradimenti in campagna (2001)) were released in France around the same weeks as the movies referenced in the main plot's time frame (Il sonnambulo (2000) etc.).