Interesting, I had the same problem today. Here's my scenario:
Client brought 720x480 AVI file to me to author.
First, I imported it into Pr CS6, adjusted the audio level, added some black video at the end, then rendered to MPEG-2 DVD.
Brought the M2V and WAV files created above into Encore.
When I went to make the DVD, it failed on writing with the PCG error in "file name" 00:00, etc.
There was discussion on this in the forums but no solution that applied to my scenario (no subtitles in this project).
I trimmed the very beginning of the file about 1/2 second, still same error.
Re-exported the M2V/WAV files from Pr with various adjustments to the settings. Same error in Encore.
Then, I happened to notice the playback video in Encore was jumpy--every second or so, the picture would jump horizontally.
This was most prominent on advancing and receding stills. Note: these same images looked fine when palying back in Premiere.
So, I'm thinking, the problem is in the rendering out of Pr.
I brought the client's original AVI file into Encore and it played back fine.
I then had Encore do the transcoding of the AVI file.
I left the exported audio file alone as I had changed the level in Pr, so it was fine in Encore.
This is a serious matter. I've never had any problem in Premiere Pro 2.0 and Encore DVD 2.0.
But I'm certainly haviing problems in CS6.
Final note, when I exited and reopened Encore, the playback is jumpy again!
Like the transcoded files are suspect after producing a perfect DVD earlier?
Good thing I could make copies from the DVD master, rather than having to rely on Encore to do it...