--- util.install.old	Fri May 30 22:23:46 2008
+++ util.install	Sun Sep 21 12:59:37 2008
@@ -9,6 +9,6 @@
  * Implementation of hook_uninstall().
  */
 function util_uninstall() {
-  db_query("DELETE FROM {variable} WHERE name LIKE '%s%%'", 'util_');
+  db_query("DELETE FROM {variable} WHERE name LIKE '%s%%'", 'util\_');
   cache_clear_all('variables', 'cache');
 }