I have an E80H that shuts off like yours. I've only used TDK DVD-R disks bought at SAMs, but I minimize the problem by putting the DVD-R disks in the player, switching from HDD to DVD, and making SURE that the new DVD-R disk has "settled down" completely before starting the dub. The settling down process can take upwards of a minute as I'm sure you know. When I've done this, I've generally been able to avoid the shutdown. I figure the problem is that the dubbing process is optimized for DVD-RAM, and the machine recognizes DVD-RAM very quickly. When a new, virgin DVD-R is inserted, it takes time for the E80H to recognize it and adjust accordingly. Once everything gets adjusted internally, all works fine.