Found a very poorly photoshopped seam right off the bat. Kind of sad for something claiming to be of such quality to go in and botch it like that. I'm sure it's covering something to keep people happy, but did you have to do it in such an ugly and obvious way?
This is to be expected from giant images like this that are assembled by automatically stitching together hundreds of smaller images. You'll see the similar artifacts or errors on sites like Google Maps, for example http://www.moillusions.com/2006/04/google-maps-haunted-road....