--- advcache.module.orig	2009-04-14 10:20:41.000000000 +0200
+++ advcache.module	2009-04-14 11:02:25.000000000 +0200
@@ -12,7 +12,7 @@
     $keys[] = 'term::'. $object['tid'];
     if ($op == 'insert' || $op == 'delete' || $op == 'update') {
       cache_clear_all('*', 'cache_taxonomy', TRUE);
-      if (module_exists('forum') && $object['vid'] == _forum_get_vid()) {
+      if (module_exists('forum') && $object['vid'] == variable_get('forum_nav_vocabulary', '')) {
         cache_clear_all('*', 'cache_forum', TRUE);
       }
     }
@@ -23,7 +23,7 @@
     $keys[] = 'vocabulary::'. $object['vid'];
 
     if ($op == 'insert' || $op == 'delete' || $op == 'update') {
-      if (module_exists('forum') && $object['vid'] == _forum_get_vid()) {
+      if (module_exists('forum') && $object['vid'] == variable_get('forum_nav_vocabulary', '')) {
         cache_clear_all('*', 'cache_forum', TRUE);
       }
     }
@@ -97,4 +97,4 @@
  */
 function advcache_exit() {
   drupal_lookup_path('cache');
-}
\ No newline at end of file
+}