Index: wp-admin/js/wp-fullscreen.js
===================================================================
--- wp-admin/js/wp-fullscreen.js	(revision 22831)
+++ wp-admin/js/wp-fullscreen.js	(working copy)
@@ -482,14 +482,7 @@
 	}
 
 	api.medialib = function() {
-		if ( s.has_tinymce && 'tinymce' === s.mode ) {
-			tinyMCE.execCommand('WP_Medialib');
-		} else {
-			var href = $('#wp-' + s.editor_id + '-media-buttons a.thickbox').attr('href') || '';
-
-			if ( href )
-				tb_show('', href);
-		}
+		$('#wp-' + s.editor_id + '-media-buttons a.insert-media').click();
 	}
 
 	api.refresh_buttons = function( fade ) {
Index: wp-includes/css/media-views.css
===================================================================
--- wp-includes/css/media-views.css	(revision 22831)
+++ wp-includes/css/media-views.css	(working copy)
@@ -62,7 +62,7 @@
 	left: 40px;
 	right: 40px;
 	bottom: 40px;
-	z-index: 125000;
+	z-index: 160100;
 }
 
 .media-modal-backdrop {
@@ -73,7 +73,7 @@
 	bottom: 0;
 	background: #000;
 	opacity: 0.8;
-	z-index: 120000;
+	z-index: 160000;
 }
 
 .media-modal-backdrop div {