notice: Trying to get property of non-object in tac_lite/tac_lite.module on line 219

On the Scheme settings page I am getting the following error message three times:
notice: Trying to get property of non-object in drupal-6/sites/all/modules/tac_lite/tac_lite.module on line 219

I'm assuming it's once for each of the terms in the vocabulary that I've set as the one to manage (none, private, public)?

The code is downloaded from CVS tonight using -r DRUPAL-6--1-2.

When I navigate to the front page of the Web site I also get the following error:
notice: Undefined property: stdClass::$tac_lite in drupal-6/sites/all/modules/tac_lite/tac_lite.module on line 413