I noticed that you commented on your panorama that it was created with a new version of Photosynth and that the old version is still on the site. This is a bit of a sore point for me, but hopefully I can explain without stepping on your toes.
Just to clarify, Photosynth was honestly never meant to be a panorama stitcher in the way that ICE is (ICE already existed before Photosynth).
To make a good panorama, your camera's lens shouldn't be moving except to pivot around your camera's imaging plane. If your camera's lens does move, then you will get artifacts in your panorama, especially as things get closer to the camera. ICE will give you better results the more you constrain your camera to one position.
By contrast, if your camera's position fails to move around objects in the scene much, Photosynth will not be able to solve very well at all for the structure of the scene. Photosynth actually does better the *more* you move all the way around objects.