I'm using a sony dru500a with latest firmware, recordnow max to burn & Princo 1-4x dvd-rs. Just bought a tub of 25 of these disks. Burned a number of movies (4.36gb). Then i checked the last few chapters on each movie to c if everything was ok and yes played no probs right to the end.(sonydvp 735s standalone) But...... When i watched a movie burned on these disks from start to finish it screws up near the end?? why when i 1st checked it by playing the last couple of chapters it is fine but when i watch the complete movie it screws up at the end??? Does the disk heat up the longer it plays thus causing me these problems? Anyone know?