He said something about "added a nos button/function? to not check the signature of the system files", so i guess this means this 3.55 firmware doesnt check if the pkgs are signed so you could just install anything on it.
Considering the poo pooing being done about the custom firmware (which I get, it's not all that impressive). This isn't all that much better. Props to geohot for actually signing a package to install it, but it's not really anything to get excited about.