Over the last two months I have been renting DVDs online. Two of the sixteen DVDs I've rented had picture faults. On one the picture froze for about two seconds, then ran on for another couple of seconds then froze again. This was repeated through about 10 seconds after which the film played perfectly to the end. About half-way into the other disc the picture froze, then jumped to the next frame still frozen and continued this 'frame at a time' play. There was also pixelation. The fault didn't clear, so I pressed Skip on my remote and jumped forward about 10 minutes. I found the fault had cleared, but returned again towards the end of the film. I complained to the rental firm who sent me another copy which played perfectly. Can anyone suggest why I am encountering these faults only on rented DVDs. All the 50 or so DVDs I own all play perfectly. Many have been played several times. My DVD Player is an LG DVD4710 which cost me £170 from Tesco 18 months ago.