It seems that empty categories are showing up for team members. Specifically, the queue category show up blank, despite the fact that the support team doesn't have any forums in it.
Validation queues cat: view permissions
No permissions in any forums in the category
<A_Jelly_Donut> hm, yeah, I think I see the bug
<A_Jelly_Donut> the empty category check is before the permission check
<A_Jelly_Donut> although ... I'm not certain how easy this would be to fix :/
<A_Jelly_Donut> includes/functions_display.php, line 148