I'm not quite sure what caused this. I think I routed the problem to be linked with using a cheat to get weapons (or specifically, weapponnum 14 -- Melee).

After doing this, the game no longer enables me to holster my weapon with any bind. I tried switching the "weapon 0" bind to several other keys, it just doesn't work.

I know the game's fresh of the line, but does anyone have any insight to this?

Melee = give weaponnum 14, weapon 14
Stun Baton = give weaponnum 17, weapon 17
no weapons = weapon (Not weapon 0)

Try that.