Logged PHP error "Invalid argument supplied"

This log 'admin/reports/dblog' reveals following errors:

PHP error: Invalid argument supplied for foreach() in {root}/sites/all/modules/jquerymenu/jquerymenu.module on line 193.

This error seems to occur whenever a web page with a jquery menu is requested/ serviced.
Aforementioned 'line 193' is the last line within the following fragment from the 'jquerymenu.module'-file:

function recursive_link_creator($items = array(), $trail) {
  $url_array = $trail;
  $i = 0;
  foreach ($items as $item) {

I am using jQuery Update 1.2.6, thanks to this module: http://drupal.org/project/jquery_update