Just before Shahzmah is shown in bed with the kidnapped princess, it is dusk or early at night but then when he escapes after the Jinn appears it is suddenly mid-day.
When Aziz sees Budur for the first time, the moon is waxing or waning. When he returns after two days to sit under her window, the moon is full.
When the chimpanzee is writing, it's clearly visible that it's not actually the chimp writing but an actor wearing a glove made to look like the chimp's hand.
The monkey or ape Prince Shahzmah turns into has been portrayed by three very different animals: a young chimpanzee, an old chimpanzee and a baboon.