We will be making a post under the News tab when VaultWiki 4 becomes available as a download that will discuss concerns like this.Have you decided if VW 4 will cost the same as 3, and if that license will be platform specific yet?
Thanks for letting me know about the permissions. I think they should be fixed now. If not, please paste the URL you are trying into a PM to me.
i think this will take much time - the major step at the moment for the team is to get vb4 working for vbulletin which is just alpha at the moment