Whenever I use the Polygonal Lasso tool lately, and then modify the brightness of the item selected, it creates a "GLOW" around the *outside* of what I have selected. So when I deselect it, there is now this "aura" around the item.
I have gone into all the settings, messed with "Feather" and the 4 or 5 other options and I see no way to eliminate this. There should be no changes outside of the selected item. Yet it seems to be reaching past the selection line just a bit, all the way around.
Here's an example: