Index: wp-includes/css/admin-bar.dev.css
===================================================================
--- wp-includes/css/admin-bar.dev.css	(revision 19592)
+++ wp-includes/css/admin-bar.dev.css	(working copy)
@@ -347,6 +347,8 @@
 	position: absolute;
 	left: -72px;
 	top: 4px;
+	width: 64px;
+	height: 64px;
 }
 
 #wpadminbar #wp-admin-bar-user-info a {