I now have set up a UBB.Threads board 7.3.1 and imported my UBB.Classics threads/posts/members to it and the Threads board is running smoothly. However, the Classic board (6.7.1), that I will be turning into an archive board shortly, has been hacked by one or two people as soon as I shut down registrations. I have the Classic board set so that only registered users can post, but this person, or persons is not only able to post, he/she can start a new topic. It has happened in two different forums so far.

So I have a question. Will this person(s) be able to do the same thing to my new Threads board? I know the PHP format is vastly different from the old perl scripts, but I'm not sure what this person is exploiting to get in. I'm not worried about the old board because when I archive it I'll just change the file permissions so that nothing will be writable anymore when I archive it, but what about my new Threads board? Will they be able to do the same thing there?