I converted the files which had scrolled as NEF and .psd to .jpg They do the same thing.

Back to 5.1.9.

Further problems, both NEF files and .psd files begin the uncontrollable scrolling up whenever I try to drag the scroll bar below the halfway point.

This is a new camera, D7000, but files processed the same way through Adobe Bridge CS5 and Photoshop CS5, saved as .psd.

Disappointing.

I ran the same stack after converting the NEFs to .psd files, had no problem. Maybe it's a conflict between Nikon RAW files and HF?

I ran several images from NEF files on 5.2.6 with no problem, then a few minutes ago, under about 200% magnification, when I tried to position the vertical scroll bar in the lower half of its travel, the slow, uncontrollable return back to the center of the image took over again! Same as it did in 5 ...

I just installed 5.2.6, after unhappy experience with 5.2.4.

So far, 5.2.6 is by far the best yet! Excellent.

Thank you.

Most of the halos are caused by the blurring in the original images where that part of the object is extremely out of focus---the opposite end of the stack from where that part is sharp. Stopping down to smaller f/ stops will help some, but diffraction, caused by the image light rays bending around ...