I also backed this movie up with no problems using the latest clonedvd and anydvd.
What speed are you burning at? when you say a partial burn - do you mean you get a burn error ? What error do you get? Have you tried dl the latest versions of anydvd and clonedvd? Change the burn speed from maximum to 4x and see if you can burn. Only guessing, but you may be hitting a buffer underun during the burn due to lack of system resources, try shutting down all other unnecessary progies before you burn.