This is the most rediculous rule in hockey. Seriously, Why has this not been addressed within the 100 years of the NHL.
For all the crap they bring in and out of the NHL, by eye that is clearly a goal. That was going to be a goal wether the net was there or not. Kuba clearly knocks the net off the moorings because the puck is going in.
If anything, it should be a "penalty goal" just like it is in rugby.