I don't see them. I am using a good quality calibrated monitor. I do see some lack of colour consistency in the black area in as much as lighter smudge. It looks to be some reflection of light off the curve of the back ground as it goes from horizontal to vertical but I had that issue also and it was attributed to a smudge of lubricant on my sensor.
Have you tried doing a shot to check for sensor dust and other sensor issues?
Actually, just checked the shot on my laptop (un-calibrated and a lower resolution) and now I see what you are saying. Actually looks a little like over processing but I wouldn't think that would be the case based on the style of shot.
Be interested to see what the out come is.