I have seen quite a lot of EXIF information from our Nikon P2 and was sure it held orientation details. I saw a 'Please rotate automatically' option in Flickr, chose it and thought no more of it. Unfortunately, the P2 reported the Stream and Tree photo as being taken in normal Horizontal mode.
There you go, a good example of what assuming does.
Still, the html is coming through in the email system OK, by the look of my previous post.