I have noticed that if I burn to a CD-RW disc in either of my DVD burners, that the disc can no longer be written to by a CD burner. I can still erase/burn to it in the DVD burners. And any CD-ROM can still read from it. I just cannot burn to the disc anymore from a CD Burner. Is this a common problem? This reminds me of the days when we had 5.25" disks in double density and high density formats.... - Joey