Continuity mistake: A full moon was shown, but it was quite dark even around the campfire. When the man came and said there was something in the field, the sky was black. About a minute later when Cameron tripped/fell, there was (moon) light near the ground. (00:16:09 - 00:18:19)
Continuity mistake: When The Artist is talking on the phone to Detective Mary Kelly, sometimes his long, wavy hair behind the phone is flat and other times fluffy (extending wider than the phone). (00:14:45)
Continuity mistake: After Sophie got into bed (with her arms under the blanket), the first and last shots showed her long curly hair sprawled over her left chest area. In-between shots showed her hair hanging along the side of her left shoulder. (00:24:30)
Continuity mistake: The champagne bottle was behind some candles on the table, but in front of them and in the corner of the table when Danny picked it up. The number and arrangement of the (CGI) candles also varied with close-up versus more distant views. (00:04:42)
Continuity mistake: When the women's legs are shown walking from the smoke, the one wearing a blue skirt and white socks has her left sock fall down in the scene. In the next scene, it is back up again.
Continuity mistake: The window with broken blinds to the right of the hole in the wall turns into a green curtain for a couple seconds, then back to blinds. When Pablo is pulling the money out of the hole in the wall, the green curtain shows up next to it (a couple feet from where the window is located). [There is a tattered green curtain on the adjacent wall.]. (00:26:33 - 00:27:06)