on insensitive, in a transform

[Kia]

I'm not sure if it was working before but right now I can't see any change when a button is insensitive when suing a transform like this:

Code: Select all

transform b_buttons:
    on idle:
        easein .2 alpha 1
    on hover:
        easein .2 alpha 1
    on selected_idle:
        easein .2 alpha 1
    on selected_hover:
        easein .2 alpha 1
    on insensitive:
        easein .2 alpha .1

since I can't find anything on the topic in the documentation and the change log, I had to ask here.
does anybody know about this "on insensitive" state?