i started to believe that, when i wanted to copy a judas priest dvd i recently bought. dvd shrink couldn't manage to compress the whole dvd enough in order to copy it in a dvd5 (the size bar had a red part, even if the compression was maximum). then, i tried to copy it with clonedvd, which copied the dvd and fit it in a dvd5. some friends of mine, brought me their dvds to see if that problem was due to that particular dvd. it came up that it was not. other dvds couldn't be copied to a single dvd5 with dvdshrink, but with clonedvd everything was fine. so i think that i will stick to clonedvd from now on.