I have done many of these Photosynth panoramas using my iPhone 4 without problem, including a couple today, but one of them today ended up looking upside down! It looks like I was standing on the ceiling when I took it! I always take them with my phone upside-down so I can pivot around the camera easier, so I'm not sure what was different about this one. Is there any way to fix it now?
Link to the naughty panorama: http://photosynth.net/edit.aspx?cid=77ae1b68-5590-467c-9c0e-2d34be85efc2