Index: sites/all/modules/tac_lite/tac_lite.module
===================================================================
--- sites/all/modules/tac_lite/tac_lite.module	(revision 554)
+++ sites/all/modules/tac_lite/tac_lite.module	(working copy)
@@ -272,7 +272,7 @@
         // in drupal 5 term is an object.  Is this right?
         $tids[$term->tid] = $term->tid;
       }
-	  else {
+	  elseif ($term) {
 		// $term is a tid.  In drupal 5 is this code still reached?
 		$tids[$term] = $term;
 	  }