Will do :)

 

As a workaround @Stonemason:

Could you perhaps add the AO to all the materials that need it, leave it off for those that don't and tell the users to use light sets without AO?

I was told that it wasn't a good idea anyway to use AO in the lights if there is already AO in the mats. And it's quite easy to switch off AO for the lights so it wouldn't be too unreasonable a request, I think...