Hi, I'm not expert on image formats but I've been using ImageMagick's mogrify tool to do bulk rotating of images like this:
mogrify -rotate 90 *.jpg
I've noticed that the images appear to be rotated fine when viewed with a Windows browser but to my horror the images I've been rotating don't seem to render as rotated when using an iPad or iPhone. For some reason the iPad/iPhone seems to think the images are still unrotated.
Does anyone know why?