Weirdest thing. The rumble doesn't work. Figured it was the extension cable I use, so I removed that and hooked the controller up to the deck directly. Still no rumble. Got a brand spankin' new controller. Plug it in and STILL no rumble. Made sure my rumble settings were on in Animal Crossing (which I was using for the test) and I get no rumble response when smacking a rock or catching fish.
Anyone have any ideas?