I have an existing web application and decided upon YAF as the best approach to add a forum. I have a need to create private forums for certain groups on the site. I was doing this programatically by creating a user group with the correct permissions, and as new members joined the group I was simply adding them with DB.usergroup_save() function. Since we've upgraded to v1.9.3 it seems the users are added to the group, but the next time the user logs into the forum, they are no longer part of the group.

I'm assuming this has something to do with the new roles and membership management, but I was hoping someone here would have some tips for me to get around this issue.