Well, im having exactly the same problem as you Bushvar. I googled a bit, searched here, at ixtreme, c4eva speaks and team xecuter forums and it seems other people have this problem too...
I flashed over 20 360s in the past years, with no problem....i now what to do, and how to do it...not a noob here.
I doubled, tripled checked all the process of making backups with the new c4eva tool, but the problem persists.
I tried burning my backups with imgburn, old version (giving the 97% error) and the new one truncating the disc, and i also tried burning it with clonecd.... still the same...
Burned at 2.4x , 4x and 6x speeds....
My drive is a liteon and my burner is a LG one (i think thats the problem here).
Plays old backups fine, as well as originals. The only problem is with new XGD3 backups. Shows "Play Game" but shows no image of it, i start it, the screen goes black and then back to the dashboard.
And yes, already tried to clear the cache as some ppl mention before in other topics. And tripled checked the new layer break
And as nothing to do with regions like solpadeineking said above. I'm making pal backups and trying to play them on a pal console. thats not the problem.
Any advice? If the problem is the burner, what do you recommend me to buy?