User blog comment:JoshuaCoalskull/Release Notes - July 10, 2012/@comment-68.193.207.240-20120711213146/@comment-1051147-20120712141457

Actually, there was a report and I believe our own Ella Storm mentioned this - that for a very short time, another island appeared on the map on test. but those who sailed there saw nothing. It could have been a glitch or it an accidental leak of something being developed.