Exhibitions turns some photos around

I found another weird one!

On one of my exhibitions some of the photos are turned around when I view them on iPad. They look fine on Explorer, Chrome, Firefox and Safari on the PC.

I thought it might have something to do with orientation but there are both landscape and portrait pictures in the exhibition and some of each type work fine.

All images are jpeg and sized and compressed the same.

http://matthewrwalters.com/exhibition/from-bump-to-baby/

You will need membership to view so let me know who is going to sign up to see if they can fix/replicate the problem.

Thanks!

Ian.