I've had my BTC 1008 for some time now and most times I'm happy but there have been more than a couple of discs that exhibit corruption in the last few chapters of movies that I burn to single layer. At times the corruption is so bad that the player just stops playing the discs altogether.

These errors typically show up in the last 15 minutes of a movie. I just recently upgraded to the latest firmware(060) after several months of being happy with 159 and I've dropped my burn speed of +R media to 4X. Is there any reason why I should see movie corruption crop up later in the disc?