You’re looking at one of the new banners that can be found on each of the four corners around Commonwealth Stadium. It features the new UK logo (that I hate) over a see-through blue checkerboard.
And if you need more shots of the stadium’s progress as the first game approaches, a message board poster over at Cats Illustrated has several photos from a tour of the stadium yesterday on his Photo Bucket account. They can be found in the slideshow story below: