Find My iPhone Update adds new Icon
Apple has updated Find My iPhone. This update adds a new icon (the same one seen in the new beta.icloud.com design) to go with the simple iOS 7 design. There are also some bug fixes, but no UI design changes.
It seems that this update was released a little too early. A normal user who updates to this version will not be allowed access because a developer account is required to use this version. Apple has now fixed this problem so any user can get in the app.