The discharge exotic weapon skill seems to have been broken recently (?). When I try using it I just get the Huh? response, regardless of whether or not I'm using a suitable exotic weapon.

My skill level in discharge is quite high (82%) when no weapon is wielded.

example:

Your divine power decimates a vicious black serpent!
A vicious black serpent is gushing blood.

<894hp 611m 933mv 21600tnl 1 AM 196 fighting indoor wilderness 89% 04:33:37> discharge
Huh?
A vicious black serpent is gushing blood.