No, they're not. We only banned sugar cane becouse of lag.
latest build DOES NOT WORK and its bugged like hell. I've tested it and got a ton and millions of errors with IC2 update. So until the build is more stable, we are staying. It's not laggy for me...
try to do this:
Think that "mypassword" is a variable, then, on your FIRST JOIN, do:
/register mypassword mypassword
then, on your NEXT LOGINS, do
/login mypassword.
Now replace "mypassword" from all the commands with a password of your choice. If it still does not work pm me and I will reset your password so you can try again.
EDIT If it does not work, send me your IGN and I will reset your password, then try the commands up there again.