title: Dark shadow on navigation bar during segue transition after upgrading to Xcode 5.1 and iOS 7.1
body: <p>When I am navigating back &amp; forth between parent and child controllers in a master - detail navigation controller, i see a dark shadow on the right side of navigation bar at top. It started after I upgraded to Xcode 5.1. It feels rough and distracting. How can  I get rid of it? </p>