The problem is exacerbated by the fact that computers (Macs at least) resolve this problem automatically when displayed in your operating system - they orient the image in portrait for you, so you're not even aware you're posting a sideways image until it hits the WYSIWYG editor. If you then go to edit the image (which I had to do just a bit ago) you're turning it sideways first, then you need to turn it back again to portrait, and _then_ you upload it.