Problem with picture pixilating

[tay666]

I've been burning VCD's for a few months now.
Up until a few days ago, I haven't really had any problems.
Now I am having trouble with small sections of my video pixilating on my copies.
I am using Nero 5.5.9. I write at 4x (have a 24x burner). Am using good media (TDK music 80 min/700mb discs), and have a 48x CDRom.
There are no marks, scratches or smudges on either the disc that is being read, or the one being written too. I am writing VCD 2.0 discs.
It is not happening on every disc, or even in the same place on every disc. I just did 10 discs, and had to re-do 2 of them. Very time consuming and wastefull. One of the pluses of VCD was supposed to be no generation loss.
Anyone have any ideas what the problem might be?
Thought I would ask here before I spend a lot of time trying to narrow down the problem. As I said, I have been doing this for a few months with no problems until now.

[hwoodwar]

Are you using Nero to encode and to burn to VCD format, or just to burn? If you are using it to encode and to burn, I suggest you use TMPGenc to encode, and then use Nero only for burning to VCD format CD. The encoder built-in to Nero is known for it's limited quality output.

[tay666]

I'm using it to do a disc-to-disc transfer.
Just a simple disc copy of an existing VCD.