Visible crew/equipment: When Louison first enters Julie's apartment, for tea, as Julie walks him over to his chair, reflected in the glass cabinet up on the wall is a boom operator walking backward, holding the boom.
Continuity mistake: When the man puts the sacks of grain on the counter, for the butcher, he places them both on a small red mat on the counter. In the next shot they're off of the red mat, and are on the actual counter.
Revealing mistake: When the postman goes upstairs to see Julie with the package, he steps on the broken step and falls down the stairs. As he rolls down, the bulky outline of kneepads under his trousers is visible.
Continuity mistake: When the man at the table blows up a balloon he dips it in a bowl. Between shots the black mark on the balloon changes location, and also, another black mark appears between the shots.
Visible crew/equipment: When the butcher is talking to Louison outside the delicatessen, after he has just arrived in the taxi, the whole boom mike is reflected in the window above them, to their left.