Goofs

The first time Julie is seen swimming in her white, one-piece suit, the pool is almost completely clear of leaves and debris. She has already said she has called Marcel to come clean the pool. Julie then uses the skimmer to clear out a few of the now more-numerous leaves. Then, the next morning, Marcel comes to clean the pool, and it is again as covered with floating leaves as it was during Julie's first nude swimming scene.

The London Tube in the beginning scenes of the movie shows the exterior of a 1996 stock Northern Line Train, but interior of a 1972 stock with a visible "Central Line" maps over the windows.

Inside Sarah's bedroom there is a window less than outside. In particular, that one on the inside left wall, near the corner, beside the writing desk, which, otherwise, can be seen in the outside shoot (in that room there are two windows on that side and one window and a french window on the side of the balcony).

The morning after Julie arrived at the villa, we can see an external shoot of the house where all the blue shutters are open. A moment later, when Sarah goes outside the kitchen and looks towards Julie's bedroom, the shutters are opened (the last french window and the window near the right corner).

When Sarah rolls up the swimming pool cover, the air mattress should move along with the cover, instead it stays fixed on the same place.

Sarah, a British author, uses a laptop with french keyboard.

When Sarah is shown typing at her laptop, she is clearly pressing the keys at random and sometimes several at once.