Hmm.. i have this option disabled.Here are screenshots,which clearly shows the difference(the number of hands in the bases is slightly different at the moment and, accordingly, the order of some players).Unfortunately i don`t have HM2 right now,but i`m assure you,there was +-1% difference in PFR value between HM2 and PT4. At the same time, as you can see, VPIP (and all other stats) is almost the same in all databases, that is, the problem is only in PFR. To be honest, I was and still am very surprised that either I am the only one with such a problem, or no one pays attention to it.