Puggo - Jar Jar's Yoda said:

jerlgrain said:

That is great news they are not in your original capture and steps 2 and 3. Any chance you may redo 4 and 5 in another fashion to see if they can be eliminated?

Not right now - too many other projects in the pipeline. What I will do is watch out for it in ROTP, and if I am able to figure out what happened and how to avoid it, I'll go back and try it on PSB.

Your letterbox mask graphic may just be the culprit here. I have no idea how this works, but I gather you made the custom "letterbox" mask as some sort of graphics overlay. Is it possible your black mask graphic isn't 100% clean/empty inside?

I get this in Photoshop a lot, when pure white isn't pure white and it isn't possible to spot on my monitor. There may be differing levels of gray in the white as residue of sloppy image editing or cut'n paste. When I overlay something like that on top of an image, the result is similar to what I see on the screencaps, and only apparent with elevated brightness/contrast levels.