The point of having an election, as I see it, is to permit the will of the people to be expressed and reflected in the policies of their government.
Here, you have a Soviet-style "election" with pre-determined results favoring Moscow's stooge. The "results" should without question be invalidated.
This may be the only way true democracy survives in the Ukraine.
I agree that fixed elections are no good. However, the only evidence I've seen that it was fixed is that the guy you want lost. It seems that every time the wrong guy wins these days, a fraud is declared. The notion that every unsatisfactory result must be a fraud is destroying the whole concept of democracy--it's undermining confidence, and ultimately, democracy is based on confidence in the fairness of the election. I don't think that it helps the cause to simply declare every election we don't like to be a fraud. Where's the proof?
Invalidating a fixed election doesn't really solve the problem anyway. You've got to find a way to have a fair election.