You can get rid of those by defining the variable:
PHP Code:
$specialtemplates = array();
before including global.php. (It looks like you'll get the same message for $actiontemplates and $globaltemplates, and maybe some others).
Those variables control which templates and datastore values are cached. You can look at som of the vb scripts to see how they're used. (e.g. showthread.php).