To describe the bug more fully:
You Dive to double the attack power of a creature.
You Parallel Universe it to get another high-powered creature.
You end your turn and attack.
After the attack, the power of the original creature goes down, but the copy's remain high.
Next turn you can Dive with the copy and get quadruple attack power... and if you have another Parallel Universe handy you can copy that too.
Next turn you can Dive with the copy of the copy and get eight time the original attack.
And so on (Though the game should soon be over)
I see that people are willing to say that they are abusing this bug. Does this mean that it is not considered serious enough to be worth a ban?