Hi there, I wonder if anyone out there has a similar problem to me, I've searched the forum, but can't find anything relevant. When I burn 4X media on my DVR-105, I often get a shaded ring around the centre of the burnt area. This sometimes stops the disc working and sometimes doesn't. Most of the media I've used is Princo, but I've also tried Ritek with the same result (although the ring seemed less obvious. If I burn at 2X the discs are all perfect. My friends are burning the same discs, on the same drives, at 4X without problems. I have a XP2000 system with 256MB PC2700 ram, running winXP pro SP1. Can anyone shed any light on this?