ACORN has been found to be perpetrating voter registration fraud in numerous states. Obama says ACORN doesn't work for his campaign, yet his campaign has funneled over $800,000 to ACORN. One consistency with Obama are his claims that he doesn't really know the people (and agencies) he associates with.
You can read it for yourself at http://michellemalkin.com/2008/08/22/acorn-watch-pt-ii-obama-hid-800000-payment-to-acorn-through-citizen-services-inc/