=== modified file 'modules/forum/forum.install'
--- modules/forum/forum.install	2007-12-11 10:52:00 +0000
+++ modules/forum/forum.install	2007-12-17 07:37:45 +0000
@@ -38,6 +38,7 @@ function forum_enable() {
  * Implementation of hook_uninstall().
  */
 function forum_uninstall() {
+  drupal_load('module', 'taxonomy');
   $vid = variable_get('forum_nav_vocabulary', '');
   // Delete the vocabulary.
   taxonomy_del_vocabulary($vid);