Index: src/js/media/views/media-frame.js
===================================================================
--- src/js/media/views/media-frame.js	(revision 45923)
+++ src/js/media/views/media-frame.js	(working copy)
@@ -1,4 +1,5 @@
 var Frame = wp.media.view.Frame,
+	l10n = wp.media.view.l10n,
 	$ = jQuery,
 	MediaFrame;
 
@@ -32,7 +33,7 @@
 		Frame.prototype.initialize.apply( this, arguments );
 
 		_.defaults( this.options, {
-			title:    '',
+			title:    l10n.mediaFrameDefaultTitle,
 			modal:    true,
 			uploader: true
 		});
Index: src/wp-includes/media.php
===================================================================
--- src/wp-includes/media.php	(revision 45923)
+++ src/wp-includes/media.php	(working copy)
@@ -3764,6 +3764,7 @@
 
 	$strings = array(
 		// Generic
+		'mediaFrameDefaultTitle'      => __( 'Media' ),
 		'url'                         => __( 'URL' ),
 		'addMedia'                    => __( 'Add Media' ),
 		'search'                      => __( 'Search' ),