I burned my first CDs using disc-at-once from a Vegas 3 project and it plays back perfectly on my cd-rom player, but on std cd players (that usually play cdr's just fine), I got:
Track 1 is fine
Track 2 stutters
Track 3 gives an error and I have to remove the Cd.
What speed did you use for burning? Lots of audio players have trouble with CDs burned at faster than 4x and will often give exactly the problems you've mentioned. I burn all audio CDs at 4x now to avoid the problem.