Kroger has made some changes to their coupon policy in various places around the country. In the DFW area we had not seen a change, but this week some were reporting that the policy had changed to not allow doubling and tripling of coupons. I think this was fueled by the fact that the Kroger ad no longer has a big banner showing their doubling/tripling policy.
However, today I made a quick run in to the Kroger nearest us (Lake Forest/Eldorado) and asked if they still are doubling and tripling. The customer service desk assured me that they WERE still doubling and tripling coupons, and they WERE NOT changing their policy.
So check the store near you and make sure they know how important their coupon policy is to you and your likelihood to shop there.