When Henri Lautrec arrives at the gallery for the showing of his pictures, as he 'walks' in, his shadow on the ground clearly shows José Ferrer's legs tucked behind him as he walks (on his knees).
When Henri falls down the stairs toward the end of the film, his legs suddenly appear regular-sized.
When an actor is swinging on a chandelier, a crew member is seen pushing him.
Henri's nose is clearly larger when he is a teenager than as an adult.
Henri is obviously older than his mother.