[ptx] Hugin - Warped image

[Andrea Carpani]

Sorry to bug the list, but I'm getting strange results while trying to
stitch some photos together: I'm quite sure I'm missing something
stupid, but I don't know what it is.
I've got 8 photos taken with a digital camera: a mountaintop panorama.
I load them in the "Images tab" (Add individual images). I click on the
third image and choose this one as the reference image ("Anchor this
image for position").
In the "Lens" tab lens type is "normal".
I set control points for every couple of image.
I optimize using "Everything".
In the "Stitcher" tab I set "rectilinear panorama". H-FOV is
autocalculated as 179.
After the stitching I get this picture:

http://www.carpani.net/files/tibert.jpg (250k)
http://www.carpani.net/files/tibert-s.jpg (50k)

Software used (from the binary rpm repository):
hugin-20040220-1
panorama-tools-2.6bml12-2

Can somebody tell me what I'm doing wrong?
Thanks

-- 
Andrea Carpani <ml at carpani.net>