Our inbox has been busier than Hogwarts' owls at Christmas after we asked you to send in your movie errors.

Sawyer, 13, from the US says When Harry and Hermione go back in time the clock strikes fourteen chimes, but there are only 12 hours in a day!

And Martin, 14, from Essex reckons you can spot Emma Watson whispering Harry's words in the Shrieking Shack.

Another fan, Spike, 14, from Rotherham says at one point you can hear director Alfonso Cuaron and Emma chatting to each other off camera.

And 16-year-old Alex thinks there is a mistake when Hermione is throwing pebbles at Hagrid's hut.

The first time round the pebble leaves a lot of the vase standing, but when Hermione repeats the scene minutes later the vase is completely smashed to pieces.

When Harry thought he saw his dad save him (it was really himself) there was a shape of a deer but when Harry went back in time it was not there.
William, 9, Barnsley

In the scene with Buckbeak the camera is close on Ron and he's clapping his HANDS for Harry, however, when the camera moves back on Harry, you can see Ron clapping one hand on his BOOK instead.
Elle, 15, Lexington

I spotted a mistake when Snape caught Harry in school in the middle of the night - Lupin came and took Harry to his office when out of the windows it was bright and sunny!
Anna, 12, Norwich

When Harry is under his invisibility cloak his eyes are green, but then when the camera goes back on him, his eyes suddenly return to blue.
Amy, 15, Dallas

When the trio are in Hagrid's hut before Buckbeak's beheading, a pebble (thrown by who we later find to be Hermione) hits the ceramic vase on the table, which breaks, leaving half of it standing up. Later, when Harry and Hermione revisit this moment in time, Hermione throws the pebble, hitting the vase, but this time when it shatters no piece is left standing up.
Alex, 16

In the scene where Harry is confronted by Snape when he's "sleep walking" Harry is holding the map one handed but the close-up shows him holding the map with two hands.
Martin, 14, Essex

When filming in the Shrieking shack, whenever Harry (Daniel Radcliffe) went to say his line, you could see Hermione (Emma Watson) mouthing it!
Katie, 12, Kent

I saw a mistake, it was when Harry looked at the poster of Sirius Black. The first time the number was 390 and the second it was 007.
Alana, 10, East Cowes

When Harry and Hermione are back in time, toward the end of that period, before they were attacked by Moony, you can clearly hear Alfonso say "Emma" then Emma/Hermione walks out of view then you can here her say "what ?".
Spike, 14, Rotherham

Hermione wraps the chain twice around her neck, so it's not long around her neck but it is when she unravels it.
Juliet, 16, Norwich

At the start of the film when Harry blows up Aunt Marge it is light, but when he storms out it's night time.
Pete, 15

I spotted a mistake - near the beginning, Harry's scar changes sides from right to left then back again.
Louisa, 11