There was a few people with the same situation while using Imgburn and Fab QT. The layer break has to be set every single time while using "clone/full disk" mode with Imgburn. Yet,I never had to set layer break before once the options(settings) were in place.
Iam away from my home PC but I think 8105 was last "working",non asking layer break set. Trust me, I checked and re-checked my settings on both Fab and Imgburn thinking things reset to default.
I only use Verbaits single/dual disks. And I just kept quiet cause I knew an update will soon fix this. The Sept 3 update didn't work,went back to 8105.
Again, I never had to set layer break before,never. And didn't change anything.