--- uc_catalog/uc_catalog.install	2010-11-09 17:56:32.430532118 +0000
+++ uc_catalog/uc_catalog.install.vid_warning	2010-11-09 17:57:22.219010497 +0000
@@ -93,7 +93,8 @@ function uc_catalog_install() {
 function uc_catalog_uninstall() {
   drupal_uninstall_schema('uc_catalog');
   if ($vid = variable_get('uc_catalog_vid', 0)) {
-    taxonomy_del_vocabulary($vid);
+    drupal_set_message(t('The Ubercart Catalog vocabulary has not been deleted. If you need to delete it, !link.',
+      array('!link' => l('please do so manually', 'admin/content/taxonomy/edit/vocabulary/'. $vid))), 'notice');
   }
   db_query("DELETE FROM {variable} WHERE name LIKE 'uc_catalog_%%'");
 }