I use DVDFAB to rip my DVD's onto my HD and then Use Nero to Copy them. even though i use the verify option on nero i noticed once that a copied dvd had a skip in it where the picture turned pixelated. I thought it was just a problem with the dvd but when i went back to check the same frame on the copy on the hard drive i found the skip, and it wasnt on the original DVD. So i guess DVDFAB skipped during the rip or something. I just wondered is there a way of checking the rip compared to the original dvd, or a software that does this as it goes along. thanks