Thanks kate and amdhappy . I'll try to make some more in a month or two.

Here you can see one of the interesting side effects of panoramic photography. Sometimes the same persons will be on your picture twice . I have a more extreme example with one man you can see four or five times on a wide panoramic shot. I don't think you'll see it clearly if I resize that one, though. This panorama contains four shots in two rows and have been stitched using the rectilinear (flat) projection of PTGui.