The books in Aydin's hands change during the argument with his wife.
The foot steps in the snow when Aydin and Hidayet leave for the train station (around 2h17 min) and when Aydin returns to the hotel (around 3h01mn) are exactly the same - although there has been a snowy day and an night in-between and Hidayet must have been back to the hotel.
The desk lamp on the table between Nihal and Hamdi has changed direction when they are still talking without moving.