If you move the last posting from a public forum to a sub forum with limited access it will left a hint in the forum summary list. It point to the new location and if the user try he get access denied (as it should, fine). This is not a security risk but an unwanted teaser. It would be better to refresh the last post list too.

my board: http://www.dragonclan-forum.de
my hobby: http://www.biker-reise.de
Ich kann bei Fragen zu UBBthreads in Deutsch weiterhelfen oder es zumindest versuchen