Doesn't save data

After some testing, I've found the problem, there is a conflict with the taxonomy_access.module (if you don't use it, you are not affected by this "bug")

The taxonomy access module implements the hook_nodeapi() too. Here is the self explaining code of the function:

function taxonomy_access_nodeapi(&$node, $op, $arg = 0) {
  switch ($op) {
    case 'submit':
      // When TAC grants 'update' access to edit node,
      // Changing $node->uid back to original creator (changed by node_submit)
      if (($node->nid) && !user_access('administer nodes') && 
(node_access('update', $node))) {
        // Populate the "authored by" field.
        $old_node = node_load($node->nid);
        if ($account = user_load(array('name' => $old_node->name))) {
        //  $node->uid = $account->uid;
        }
        else {
          $node->uid = 0;
        }
      }
      break;

    case 'update':
      // restore terms that the user shouldn't have access to delete
      taxonomy_access_restore_terms($node->nid, $node->tac_protected_terms);
      break;
  }
}

As you can see from the code, if an user doesn't have the "administer nodes" permission but he can update the node thanks to the taxonomy access control, $node->uid is set to the old value.

Someone has some hints?