Index: wp-includes/functions.php
===================================================================
--- wp-includes/functions.php	(revision 19413)
+++ wp-includes/functions.php	(working copy)
@@ -2881,6 +2881,22 @@
 		a:hover {
 			color: #D54E21;
 		}
+		.button {
+			font-family: sans-serif;
+			text-decoration: none;
+			font-size: 14px !important;
+			line-height: 16px;
+			padding: 6px 12px;
+			cursor: pointer;
+			border: 1px solid #bbb;
+			color: #464646;
+			-webkit-border-radius: 15px;
+			border-radius: 15px;
+			-moz-box-sizing: content-box;
+			-webkit-box-sizing: content-box;
+			box-sizing: content-box;
+			background: #f2f2f2 url(wp-admin/images/white-grad.png) repeat-x scroll left top;
+		}
 		<?php if ( 'rtl' == $text_direction ) : ?>
 		body { font-family: Tahoma, Arial; }
 		<?php endif; ?>