Hello Hugh,
Thanks. I am a bit unhappy about the halo around the pine tree, but I just couldn't process it out and the original image(s) just didn't mask well into it. I do find it strange that it haloed there but not around the dark bare branches on the right.
I assume you are using PhotoMatix? Px doesn't do well with some gradients. What is halos around the pine is unnaturally light areas behind the bare branches. It is sometimes possible to adjust sliders until the over-all image is light enough that halos don't show, and then add contrasts as necessary in PS.
hugh