Index: wp-admin/css/wp-admin.dev.css
===================================================================
--- wp-admin/css/wp-admin.dev.css	(revision 16471)
+++ wp-admin/css/wp-admin.dev.css	(working copy)
@@ -1361,13 +1361,17 @@
 
 .sorting-indicator {
 	display: none;
-	float: left;
 	width: 21px;
 	height: 4px;
 	margin-top: 5px;
 }
 th.sortable a, th.sorted-asc a, th.sorted-desc a {
+	display: block;
+	overflow: hidden;
+}
+th.sortable a span, th.sorted-asc a span, th.sorted-desc a span {
 	float: left;
+	cursor: pointer;
 }
 th.sorted-asc .sorting-indicator, th.sorted-desc:hover .sorting-indicator, th.sortable:hover .sorting-indicator {
 	display: block;
Index: wp-admin/includes/class-wp-list-table.php
===================================================================
--- wp-admin/includes/class-wp-list-table.php	(revision 16471)
+++ wp-admin/includes/class-wp-list-table.php	(working copy)
@@ -610,8 +610,7 @@
 					$order = 'asc';
 					$class[] = 'sortable';
 				}
-				$column_display_name = '<a href="' . esc_url( add_query_arg( compact( 'orderby', 'order' ), $current_url ) ) . '">' . $column_display_name . '</a>';
-				$column_display_name .= '<div class="sorting-indicator"></div>';
+				$column_display_name = '<a href="' . esc_url( add_query_arg( compact( 'orderby', 'order' ), $current_url ) ) . '"><span>' . $column_display_name . '</span><span class="sorting-indicator"></span></a>';
 			}
 
 			$id = $with_id ? "id='$column_key'" : '';