I've used hugin in three periods: early experimenting in 2004, while I was still playing with Canon G3, quick test in 2006 to see if things have improved and today.
Todays experiment (check end of message for images) shows same problems that I faced in 2006. When I try to combine just couple images which has been taken on 20D with manual settings (1/640s, f8, cloudy WB), I still get obvious seam to the sky, when I combine those images.
Images were shot in raw, but all known modifiers in Bibble turned off (autolevels, highlight recovery, fill light were off, wb, levels, curves, etc. were not modified).
One obvious candidate to blame would be the lens, but Canon EF 17-40/4L lens is supposed to be good at what it does and same goes for EW-83DII hood and Hoya Pro1 Circular polarizer that I had on lens, while taking those images.
Any ideas why I can't handle as simple task as this without obvious seams on sky part of panorama? If I could make this work, I could sell my UWA lens and start doing panoramas instead, but current results out of hugin can't compete with what I get from 20D + Tokina's 12-24/4.
Anyway: here is the panorama that I was able to produce:
http://www.flickr.com/photos/jylitalo/928323421/
