I had one hell of a time getting Nero 5.5 to burn properly on the new Dell box I have at work. I use 5.0 here at home at 4X and works like a champ, but it would fail like 5 out of six times on the Sony 12X at work. I even underclocked the burning to 8X and it still had multiple fails. I finally gave up and went back to the pre-installed version of EZ-CD. I prefer Nero because of the freedb lookup when burning audio CDs, but hey whatever. I never really figured out what happened to make it fail so much. Nero complained that both the CD-ROM and the burner were on the same IDE chain, but it seems to burn fine under Adaptec.