actually, it seems that none of that is true.
He does make some fantastic movies, though. For one thing, Soon Yi was never really his stepdaughter--she was Mia's step daughter. The two never even lived together when they were a couple (Mia and Woody), when they were together, and Woody only really met the girl when she was 18 (call it creepy all you want after that, but the fact of the matter is he had no real contact with this girl until she was an "adult").
Even the other kids are pretty much coming out against Mia as leading a long campaign of brainwashing and turning the daughters against Woody, essentially making up allegations that have been outright dismissed in court--profound lack of evidence, and all that.
Not saying he isn't creepy, but it's pretty clear that he never molested a child.