(For last item I mean something like placing the images in the synther like so:
Where it is that the Photosynth viewer is currently reading the author data from, I'm not sure, probably from an alphabetized list/index of the images in the synth's metadata but somehow when the image list gets alphabetized, the photographer names do not get sorted along with the image numbers.
The only place which I distinctly remember the photos' original metadata being stored (including the author/photographer) is in the 'thumb.jpg' which sits outside of the image pyramid for an image.
The author metadata in the thumb.jpg for each image remains correct, so clearly the viewer is not loading the thumb.jpg file for each photo viewed (as that would be bandwidth ineffective), else it would be correct.
In any case, I'd like to see this resolved.
I don't know the solution for all the existing synths, but their thumbs do contain correct data.