Changing Save button text bypasses Mollom

Mollom rocks, like the rest of Drupal. ;) I think I have found a situation whereby Mollom gets bypassed. I have to override the node edit form to provide some default values and related node lookups (I would have done it all w/css and cck defaults if possible but it wasn't). This is happening in a production site with a ton of modules, so I isolated it down to a fresh install of core + mollom to verify.

I have created a custom content type called custom_type. I copied the garland theme to /sites/all/themes and used the following code to provide the name of an override for the node edit form:

function garlando_theme() {
  return array(
    'custom_type_node_form' => array(
      'arguments' => array('form' => NULL),
    ),
  );
}

function garlando_custom_type_node_form($form) {
  $form['buttons']['submit']['#value'] = t("Anything");
  return drupal_render($form);
}

The line $form['buttons']['submit']['#value'] = t("Anything"); will cause Mollom to be bypassed when I submit a new custom_type node with spammy content. I can literally change the text to anything for this to happen. IF I comment out the line $form['buttons']['submit']['#value'] = t("Anything"); then Mollom begins to work again. Whatever other mayhem I do with the form does NOT affect Mollom -- just changing the button text.

Very strange. Perhaps I shouldn't change the text of the button in this fashion anyway? Thanks!