Yukon does not throughly randomize cards between deals
I play Yukon for long periods of time (alternating with Ten Across) and noticed that the same cards end up being dealt in the same spot on the subsequent dealt (or if you just hit New Game Cntl-N). Recently I have noticed that if you win a game, the odds seem to be much better that you will win the next game. I have gone on winning streaks of three, four or even five games which seems to me to happen more frequently that if the deals were completely random.