Dave & Linda,
I use the Canon software as well with My Pictures, edit with the same software and upload from the software. Occasionally, not all the time, the ATP upload box will show images in a folder I'm planning to load from all flipped sideways. These are always the original larger file images. Any images that have been resized previously to under 300k remain upright/correctly oriented. No answers for this, I am computer challenged, thought it might help you in figureing out the problem others are having too, I just go back into my Canon photo album and make sure the image is resized before hitting the upload button.
