I got rid of alcohol, same problem.
Then i pulled the drive out, stick it in another computer, install the latest version of nero, same problem.
The odd thing is it's ALWAYS the same files that have crc or read errors.
Installed imgburn to test burn an iso, verifed ok on a test -RW. Tested on another system with CDCheck and checked out ok.
Burnt onto a -R, verified ok. Did a CDCheck on the A09 and checked out ok. Stick it into another pionner dvd rom on another system, and bam CDCheck comes up with errors.
Don't have access to alternative media at the moment.