Index: wp-includes/bookmark-template.php
===================================================================
--- wp-includes/bookmark-template.php	(revision 7599)
+++ wp-includes/bookmark-template.php	(working copy)
@@ -181,7 +181,7 @@
 				continue;
 			$output .= str_replace(array('%id', '%class'), array("linkcat-$cat->term_id", $class), $category_before);
 			$catname = apply_filters( "link_category", $cat->name );
-			$output .= "$title_before$catname$title_after\n\t<ul>\n";
+			$output .= "$title_before$catname$title_after\n\t<ul class='xoxo blogroll'>\n";
 			$output .= _walk_bookmarks($bookmarks, $r);
 			$output .= "\n\t</ul>\n$category_after\n";
 		}
@@ -192,7 +192,7 @@
 		if ( !empty($bookmarks) ) {
 			if ( !empty( $title_li ) ){
 				$output .= str_replace(array('%id', '%class'), array("linkcat-$category", $class), $category_before);
-				$output .= "$title_before$title_li$title_after\n\t<ul>\n";
+				$output .= "$title_before$title_li$title_after\n\t<ul class='xoxo blogroll'>\n";
 				$output .= _walk_bookmarks($bookmarks, $r);
 				$output .= "\n\t</ul>\n$category_after\n";
 			} else {