@brynolf Put your copied disk in your drive, and open Nero's CD/DVD Speed utility. Once it displays the information about the drive your disk is in, look at the disk type. If it's formated as a DVD-R (or +R, depending on the media), that could be your answer. Many set tops that are rated for being able to read recordable media will do so... but not quite smoothly. Navigation problems seem to be the most common hicup, but others here have also noticed "stuttering" of their video streams (I was one of them). If it's formatted as a DVD ROM, these problems seem to disappear. Of course -- as you've discovered -- other set tops seem to have no issue with playing back recordable media. Lots of booby-traps, this hobby has. *sigh* Also, let us know what brand of drive you're using along with what format you burned to... you may be able to change the format setting quite easilly. Hope this helps! :) Happy New Year! :)