After the Update, the user registration was altered unintentionally so bots break in. Should be fixed now.
I will make some adjustments within the next days. The new board software has some new features along with several fixes concerning security issues. The old one was at its end of maintenance so an update was required anyway.
To be fair, the old suikosource board design wasn't so good to begin with, and the new phpBB version has some nifty features, e.g. a mobile design! Not that I'd care, I don't have a smartphone, but it's still cool.