Special Menu Items nolink not working on smallscreen accordion menu

I have Superfish installed on both Drupal 7 and 6 sites. This issue is related to my D6 sites where I have a Special Menu Item module 'nolink' with a submenu. On D7 everything works as expected. Unfortunately I don't know if this is a Special Menu Item issue or a Superfish issue so please bear with me.

Basically it would appear that my nolink menu items do not receive the 'menuparent' class, and as a result they do not open when clicked in the Accordion menu in smallscreen form. In fact they do nothing. Looking at the smallscreen.js code it requires the 'nolink' class item to also have 'menuparent' as a class in order to work.

Any ideas what might be happening here (or not as the case may be)?

Thought I'd try here first, so if it looks like a Special Menu Item issue I'll go ask on the issue queue there.

Thanks in advance!