uhmm,
I created a new group which name is pre-user, and set "0" the value for "Can create new topics",
and then,
on group editor, I set the "Post count" value 100 for Users,
after that, I registered a new user and tried to create a new topic but it can create,
I guess new user supposed to be member of "pre-user" group but not, I also made a search with type of group name "pre-user", I couldn't find any user.
what is wrong?