Index: wp-includes/category-template.php
===================================================================
--- wp-includes/category-template.php	(revision 6671)
+++ wp-includes/category-template.php	(working copy)
@@ -374,6 +374,8 @@
 	if ( 'DESC' == $order )
 		$counts = array_reverse( $counts, true );
 
+	$counts = apply_filters( 'wp_tag_counts', $counts );
+
 	$a = array();
 
 	$rel = ( is_object($wp_rewrite) && $wp_rewrite->using_permalinks() ) ? ' rel="tag"' : '';