'99 9-3 auto, reverse lights stay on

From time to time (maybe about 50% of the time actually) the reverse lights will stay on when I move the gear selector past 'R'

I have been told up and down that this is the neutral safety swtich by mutiple sources - desipite the fact that the car has always started just fine even when the reverse lights were stuck on. I also just replaced the neutral safety swtich, and I can tell you most difinitively is not the NSS.

In fact the reverse lights were still able to come on when the shift cable was not even hooked up to the NSS. This leads me to believe that there is either a swtich on the shifter housing, or a relay somewhere. Anyone have any ideas?

This is the last silly little thing I need to take care of before I really try to sell this car. I don't like my cars to have too many odd issues when I sell them, and this is certainly odd enough that I want it taken care of.

Thanks!