This is a screen shot of the two. All I did was crop and zoomed in and there it was. Then I deleted the crop and zoomed in and it was gone.

I supppose it could be banding since there is shadow there but why does it only show up when I crop and I guess I never saw "banding" like this. I wish it was clearer here but it really lookes like a perfectly aligned grid.

Wierd! Anyway, I went on to process the photo and applied a few actions to the photo and it seemed to not be noticeable under normal web viewing. I posted the full photo under the "Current Photos" thread.