>>96416174
Those are not a problem and anyone who thinks they are are some of the most gullible retards imaginable, the kind that would buy the Game Science Salespitch hook-line-and-sinker.
Whatever fractional differences the distribution of numbers gives the die are almost completely removed through the tumbling process. Even if there was a difference, we're still talking about something that would need thousands of rolls to create any sort of perceived difference, making it a moot point to begin with.