backups acting strange

[vandakeg]

I have been backing up many of my dvds lately, ever since I got DVDXCopy. I've done about 10 different movies, some fit on one disc, most took two. I checked all the backed-up dvds just to make sure they'd play, and they all did. However. since I've actually been watching the back ups, I've noticed that some of the original content will not play.
For example. The last two chapters will not play on one of my movies (4.3gb, fit on one disc)... also, some of the special features will not play on another disc (i believe those features were the last .vob on that disc as well)... could this be a media problem? Does some media actually have a problem handling their full capacity of storage?? Any advice or suggestions would be greatly appreciated!
Oh, I'm using nero to burn after dvdxcopy rips, UDF 1.02. Both Maxell, and Verbatim discs were used, w/ similar problems.

[BodyMaker]

I don't know if this is related to your problem but i used to have problems playing the ends of backed up disks burn't at 2X untill i started using record now max 4.5

But disks were ok burn't with nero if i only used 1X

[BodyMaker]

By the way i use infinity (ritek G03 disks)