My Karma must have recently hit fifty (er... Excellent) since I've started getting the option to turn off the +1 Karma bonus.
But I don't seem to get the Karma bonus either way, option set or option unset. I don't really care about the bonus itself (I usually turn off the +1 bonus, in fact) but I wish when the box was there, it would do what it claims to do.
Maybe I'll e-mail CowboyNeal.