The position of Leila's legs on the radiator changes between shots as she talks to Allie.
When Leila is sitting at the window, the number and position of items on the windowsill change.
The reflection of Leila sitting in the chair shows the the back of the chair near to the mirror, when all other shots have it the other side of Leila.
Allie stands in the middle of the room to talk to Leila, but the close shot shows his back closer to the wall.
The bed coverings are rearranged between shots in the apartment.
When Allie reads to Leila from the book, he does not read continuously but instead takes snippets from the text, skipping sentences as he does.