I check this with all my computer and this one spot look like u can see the sky when u not suppose to Here a screen shot and where it is plain to see http://img.photobucket.com/albums/v724/lgNuke/emp_escort0000.jpg
There is another of these in one of the spawns. The wall below has a rounded corner, but the wall above ends in a right angle. So you get a quarter circle inverted hole showing into skybox.