Index: editor.css
===================================================================
--- editor.css	(revision 41126)
+++ editor.css	(working copy)
@@ -192,6 +192,11 @@
     text-align: center;
 }
 
+/* TinyMCE notifications */
+.mce-notification-inner {
+	word-break: break-all;
+}
+
 /* TinyMCE menus */
 .mce-menu,
 .mce-floatpanel.mce-popover {