I have just uploaded the first bleeding-edge version with the new quota/restriction implementation. This constitutes a massive back-end re-write. Two new iptables (kernel) modules, three binary user-space programs (written in C) and a ton of shell script were involved.
It may still be a bit rough around the edges, so please be patient and report any problems you have. Eliminating bugs in the new system will be much easier than with the old one, so I should be able to iron out the quirks pretty quickly.