In defence of the die, I see absoltely no problem with them. I, as DM, always roll high scores. The problem is not with the die, it is with the roller. Take one of my players, for example- a level 6 warrior. He not only thinks his d20 is posessed, and gets bad rolls, but he was killed. By a level 1.
It is my conclusion that the player rolling bad scores suffers an atitude problem, and should work on becoming a better player. Then perhaps the die will love him, nuture him, and give him good rolls. If your lucky, the characters life may even be spared!