I ripped a bunch of episodes of the simpsons using dvd shrink then handbrake, but when i tried to play them, they didn't appear to be centered, they were not cropped right. So, i stuck in the actualy dvd, and these also were not centered, there was a black bar on the left hand side that was always present. I tried to crop it using handbrake, but i found that the black sides changed width depending on which chapter was playing. Is there something wrong with my dvd drive? or is it somthing else?