Index: wp-includes/category-template.php
===================================================================
--- wp-includes/category-template.php	(revision 11710)
+++ wp-includes/category-template.php	(working copy)
@@ -521,7 +521,7 @@
 function wp_tag_cloud( $args = '' ) {
 	$defaults = array(
 		'smallest' => 8, 'largest' => 22, 'unit' => 'pt', 'number' => 45,
-		'format' => 'flat', 'orderby' => 'name', 'order' => 'ASC',
+		'format' => 'flat', 'separator' => "\n", 'orderby' => 'name', 'order' => 'ASC',
 		'exclude' => '', 'include' => '', 'link' => 'view', 'taxonomy' => 'post_tag', 'echo' => true
 	);
 	$args = wp_parse_args( $args, $defaults );
@@ -597,9 +597,8 @@
 	global $wp_rewrite;
 	$defaults = array(
 		'smallest' => 8, 'largest' => 22, 'unit' => 'pt', 'number' => 0,
-		'format' => 'flat', 'orderby' => 'name', 'order' => 'ASC',
-		'topic_count_text_callback' => 'default_topic_count_text',
-		'filter' => 1,
+		'format' => 'flat', 'separator' => "\n", 'orderby' => 'name', 'order' => 'ASC',
+		'topic_count_text_callback' => 'default_topic_count_text', 'filter' => 1,
 	);
 
 	if ( !isset( $args['topic_count_text_callback'] ) && isset( $args['single_text'] ) && isset( $args['multiple_text'] ) ) {
@@ -677,7 +676,7 @@
 		$return .= "</li>\n</ul>\n";
 		break;
 	default :
-		$return = join( "\n", $a );
+		$return = join( $separator, $a );
 		break;
 	endswitch;