I just saw this and figured I'd post it for the people who haven't seen it. This seller on Ebay posted a couple pictures of a physical copy of the Japanese pressing of Watershed. You can get a good look at the back artwork...which is strange to say the least. I guess now the special edition cover makes a little more sense...
http://cgi.ebay.com/OPETH-Watershed...goryZ307QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
http://cgi.ebay.com/OPETH-Watershed...goryZ307QQssPageNameZWDVWQQrdZ1QQcmdZViewItem