I noticed it right off about 1000 posts ago....he will correct it, he couldn't do it then, for it will bring attention to it...
LOL. Yes, I agree, correcting would have only drawn attention to him. Besides, I'm sure it isn't noticable on the floor, it only shows up in the overhead shots. I saw it right away, too. Thought at first it was perhaps just the camera angle but decided not.