Yup yup, you're not completely crazy :P
/kb is a popular alias used by many because of the speed it kicks and bans people. However, the -k switch was introduced to the /ban command in mIRC 6.1, which is why you've heard of a "new" command related to this :P
As for the help file, /help /ban <G> but I think you already knew this :tongue:
Regards,