As Aschenbach watches the departing Tadzio just after he twirls on the canopy posts, two young boys are walking hand in hand toward the camera. In the next shot, only one of the boys is seen walking in front of Aschenbach.
When Aschenbach first asks the hotel manager about the situation in Venice and the manager finishes by saying, "There's nothing to worry about," his glasses are on his face. The scene cuts to a different angle, and the manager repeats, "Nothing to worry about," but he's holding his glasses in his hands.
Just before leaving his hotel room for the first time, Aschenbach puts a handkerchief ("pochet") in the pocket of his costume. The handkerchief is gone when he arrives downstairs.
The size and shape of von Aschenbach's rose buttonhole changes multiple times during the final beach scene.
The prostitute peers out from the piano towards von Aschenbach on her left, then is shown sitting facing him on her right.
TV aerials are clearly visible on Venetian rooftops in one scene.
At around 1h 13 mins, Tadzio plays Ludwig van Beethoven's "Für Elise" in the hotel lounge but his fingers are in the very top range of the piano, some two or three octaves higher than the sound actually heard.
A scene near the end of the film shows a beautiful setting sun over the water. But the beach of Venice's Lido faces east, and the sun sets only in the west. The sunset from the Lido beach cannot be seen over water.