My understanding is that for PC users you can open the pic in Pic & Fax viewer and then save it when it is vertical. I don't think there is an actual save button, but you can ctrl S and that will do it. I'm not convinced of how reliable that is, so certainly if the pic goes into photoshop and is rotated and saved it will be ok when uploaded.
Being very fortunately unfamiliar with Macs, I can only suggest the photoshop 9or similar) solution for them.
O'course what will work every time is if you keep the camera horizontal, move back a bit, and then crop in, using photoshop or similar. So 6 of one, half a doz of the other.
All in all, I do hope a solution is found soon because my neck aches.....:D
Edit:That's because everyone is having the same problem :roll: