Index: src/wp-includes/js/media-grid.js
===================================================================
--- src/wp-includes/js/media-grid.js	(revision 29084)
+++ src/wp-includes/js/media-grid.js	(working copy)
@@ -201,7 +201,7 @@
 			libraryState._renderTitle = function( view ) {
 				var text = this.get('title') || '';
 				view.$el.addClass( 'wrap' );
-				text += '<a class="add-new-h2">Add New</a>';
+				text += '<a href="#" class="add-new-h2">Add New</a>';
 				view.$el.html( text );
 			};
 			// Add the default states.
@@ -220,6 +220,7 @@
 
 		addNewClickHandler: function() {
 			this.trigger( 'show:upload:attachment' );
+			return false;
 		},
 
 		/**
@@ -649,4 +650,4 @@
 		}
 	});
 
-}(jQuery, _, Backbone, wp));
\ No newline at end of file
+}(jQuery, _, Backbone, wp));