so i think i may have a solution, but i really don't know what the hell i'm doing.

Any way i had a look over the kkk plugin for keysnail [1]. and they are just using the stopPropagation
method instead of both stopPropagation and preventDefault.

This seems to also work for the key-kill plugin, i have attached the patch i'm using to get key-kill
working again.  As i said though, i don't really know much javascript so i'm not sure if there will be
any side effects.

1. https://github.com/mooz/keysnail/blob/master/plugins/kkk.ks.js