is that sharpening or chromatic aberation? If it's oversharpening, how come it's only on the trees (not the reeds where it should also show) and how come it's always only on one side?) I think this is just serious chromatic aberation...
I like the area. I have to say that it is way over sharpened. Im no pro but it looks like there are a lot of halos around the tree limbs. It looks like the picture was a little out of focus when shot.