Special Forumbit Hides
I had the Special namespace to show inside another forum. But it wasn't appearing. If I changed my vBulletin settings to show Private forums to users without permission, the Special namespace would appear.
Fixed for the next build. This occurs because the Special namespace doesn't use forum permissions at all (it's not really a forum) so vBulletin was flagging it as private. Gave it a 'canview' value (provided "Can view Special pages?" is on) to trick vBulletin into creating the forum bit.