i recently got a pano head (a nodal ninja) and i'm having all sorts of
trouble with seams in my panos.  i have simplified my image set in an
attempt to isolate the problem, not that i think i have the problem
identified i'm not sure how to fix it.

i took a set of photos to make a 360x180 of my living room.  the
photos were taken at a focal length of 24mm, 30 degree steps around
the vertical axis and 30 degrees around the horizontal, for a total of
60 images.  when stitching the entire set i was getting a lot of
misalignment and seams in the full 360x180 pano.  i tried to fix this
by working with the control points, but ended up going in circles
(quite literally!).  i then decided to look at only the 12 images that
make up the 'level' cylindrical pano.  when adding control points, i
noticed i was having the same problem, but less pronounced.  my next
step was to delete all control points between the first and last
images in the 12 image set.  this produced a perfectly aligned set of
12 images, however the first and last images were obviously not
aligned and major errors were present between those two images.  if
control points are created between these two images, the seams re-
appear between previously 'perfectly' aligned images.  the seams have
proven very difficult to minimize, let alone remove entirely.

i have carefully found the nodal point for the lens i am using and
can't see any visible parallax across the images.  i am using 16-bit
tiffs from ufraw, they are pretty big (about 73 megs each, 810 megs
for all 12), so its might not be feasible to post them.  i can re-
process them as 8-bit (about 400 megs for all 12).

i'm using hugin 0.8 and autopano-sift-c from svn.

is this normal?  am i doing something wrong or missing a step?

thanks for any help!
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