Index: wp-includes/css/media-views.css
===================================================================
--- wp-includes/css/media-views.css	(revision 22831)
+++ wp-includes/css/media-views.css	(working copy)
@@ -564,6 +564,15 @@
 	right: 0;
 	bottom: 0;
 	padding: 5px 10px;
+	overflow: hidden;
+	max-height: 100%;
+
+	-moz-box-sizing:    border-box;
+	-webkit-box-sizing: border-box;
+	-ms-box-sizing:     border-box; /* ie8 only */
+	box-sizing:         border-box;
+
+	word-wrap: break-word;
 	text-align: center;
 	font-weight: bold;
 	background: rgba( 255, 255, 255, 0.8 );