Index: wp-content/themes/twentyten/style.css
===================================================================
--- wp-content/themes/twentyten/style.css	(revision 17326)
+++ wp-content/themes/twentyten/style.css	(working copy)
@@ -286,6 +286,7 @@
 	line-height: 18px;
 	margin-bottom: 18px;
 	padding: 1.5em;
+	overflow: auto;
 }
 abbr,
 acronym {