you need to make the changes to includes/modules/attributes.php
It seems this isn't working for dropdowns...at least not on my site.
Not sure what is different, but it seems I am now able to select single or multiple dropdowns as an option for the attribute display function. (this started working after I applied a bugfix for 1.5.1. When I select any of the "dropdown" styles as the option, I do not see the product qty displayed next to the attribute - it works fine for radio buttons though.
Bookmarks