here are some pictures of the pre-blocked pashmina herringbone scarf. it's SO pretty in person. i think blocking will take care of some of the edge curl there, though i see the original has a bit of a curl, so it may be the nature of the stitch.
project notes: the finished scarf weighs 3.95 ounces, and i have .20 oz. left. whew! the last few rounds i weighed my yarn every time i hit that marker. the last round before binding off i knit using a much smaller needle (size 5) than the whole rest of the scarf (size 11). i knew i would do a sewn bind-off to match the cast-on edge, and i did not want it to be too saggy and loose. i had about 1 foot of yarn left over from my sewn bind-off edge! and i thought i was being overly generous in my length estimate!
here it is doubled around my neck:
here it is with one folded end tucked into the other:
is this what your "seam" looks like? i think i followed the round transition instructions properly, and i like how it looks, but i haven't found any photos of anyone else's seam.
ETA: now that i'm DONE, i've noticed that a lot of people solved the edge problem by using a crocheted cast-on and then a typical bind-off. simple and elegant solution.