Speed Limit not working - privatemsg submit handler not registered

The form hook for the privatemsg_new form does not register the form api hook for the submit validate function correctly. Atleast not on the 6.19 version site with privatemsg 6x-1.3

Attached is the patch for function privatemsg_limits_form_privatemsg_new_alter, and the one line change is:

$form['privatemsg']['submit']['#validate'][] = 'privatemsg_limits_form_privatemsg_new_validate';