i'm a canon guy too, but i could've sworn that i was still able to manually pop the flash if i had non-active adapter in the hot shoei guess thats just a nikon thing then, i can put a plastic shoe in any of my canon camera hotshoes with no contacts and the on camera flash still wont try to pop up cause of that leaf switch
i didnt mention the fact that he had a cold shoe mounting pc-hotshoe cause others already did, i was just pointing out the one pin is really all you need for manual flash operation
nm. i just checked and it doesn't. haha. must be a nikon thing.