Index: wp-includes/css/wp-pointer.dev.css
===================================================================
--- wp-includes/css/wp-pointer.dev.css	(revision 18957)
+++ wp-includes/css/wp-pointer.dev.css	(working copy)
@@ -9,6 +9,7 @@
 .wp-pointer-buttons {
 	padding: 0 0 10px 0;
 	overflow: auto;
+	width: 350px;
 }
 .wp-pointer-buttons a {
 	float: right;