Any1 ever hear of A/V Sync problem with clonedvd when cutting some video out?

hello im gonna have to cut some of my movie out(the credits) to get 100 percent quality and i was just wondering if anybody had any issues when cutting out video(A/V Sync issues or other problems???). i think i can recall with other programs when cutting out vvideo, people have said they had a/v sync issues. has anybody had this or know somebody who had this problem with Clonedvd???