--- category-template.php	2007-09-18 17:32:22.000000000 +0100
+++ /Library/WebServer/Documents/wordpress/wp-includes/category-template.php	2008-03-20 14:15:32.000000000 +0000
@@ -323,8 +323,11 @@
 	$return = wp_generate_tag_cloud( $tags, $args ); // Here's where those top tags get sorted according to $args
 	if ( is_wp_error( $return ) )
 		return false;
-	else 
+	else if (is_array($return)) {
+		 return $return;
+	} else {
 		echo apply_filters( 'wp_tag_cloud', $return, $args );
+		}
 }
 
 // $tags = prefetched tag array ( get_tags() )