One of the testable hypotheses of Intelligent Design theory is irreducible complexity. A term coined by Michael Behe in his book Darwin’s Black Box. I think this concept could possibly problematic from a Creationist perspective, because I don’t believe anything is irreducibly complex to God. It’s not a problem from an ID perspective, because ID doesn’t entail the existence of God. We know there are things designed by the intelligence of humans that are irreducibly complex (e.g., a mousetrap); however, if you start with the assumption of an all-powerful and all-knowing God, then there is nothing that would be irreducibly complex to God.
I’m just trying to think through this issue, and I think this is a possible point of divergence between ID and Creationism. I don’t propose that I speak for the majority of Creationists here, but these are some thoughts that I’ve been having on the subject. I’ve not yet made up my mind on the issue and welcome opinions.