One of the most hated features of low quality discs is indeed the huge variability among batches. In the worst cases you can get a box containing both decent and totally defective media. Some time ago I got a 25 discs box of RICOHJPN discs and about half of the discs were defective (i.e. coasters at the end of burning). So, even if you were able to burn these discs in past, this doesn’t means that discs are good. A lot of people here in the forum complained the same problem reported by you and they were using too the same discs.
Another very ominous feature of low quality discs is their (sometimes very fast) deterioration in time. So, I suggest to check your oldest burned discs and check if they are still readable. If you notice that the disc is becoming difficult to read, then retrieve all data asap and burn again on a quality disc
[QUOTE=silvertrees;2450052]I’m using a pirated version of Clonedvd 6. Could that be a reason for my problems?[/QUOTE]
Other than being definitely illegal ;), I don’t think that this can be the cause. The only way in which the burning software can be the culprit is a completely buggy software that is sending wrong instructions to the firmware. But these events are very rare (luckily)
[QUOTE=silvertrees;2450137]do I have to run a decryption program such as ANYDVD in the background while running Clonedvd? I thought that Clonedvd took care of that on its’ own? If not, would that explain why I’m getting defects on the burned discs?[/QUOTE]
No, a decrypting software is needed only when you rip a movie, but for burning you need only a properly working burning software.