[l1ake]

as far as what does work for me:

Pre and Post Fix Does Work
Kicknonregged Does Work - this means that it is pulling steamids from the db

You have to be careful because the fmapi_phpbb uses the wrong field (user_sig instead of user_steamid) so if you didnt change it to user_steamid, then it wont be able to get the steamids from your database.

If you want the prefix to keep the space, you have to set it to fm_prepend "Pub: ". Dont forget the space after the semicolon. I suggest that you set this in your amx.cfg, otherwise it go back to default on server restart or map change.