The story I read (which is the one that was posted) said this...

However, he said, the ban on donations to ACORN won't be lifted "until and unless it is clear that CCHD funds will not go to an organization that has engaged in unlawful activities or voter registration fraud."

We already know that ACORN has not engaged in any unlawful activities or voter registration fraud, so I think the Catholic Church is just using that as cover for something they wanted to do anyway.