Digital BW, The Print

Thanks for the responses on this question.  

I have only spent a few days converting CDs to DVDs, so aging of the 
DVDs was not the issue.  I have used the Sonic and Nero Burn softwares 
and am using a Phillips (IDE?) DVD recorder.  I never use labels or 
marking pens on the discs.  The problem now seems tracable to the discs 
I was using, the Delkin "Efilm Archival Gold" DVDs sold by Light 
Impressions.  These have produced about a 75% data corruption (and, 
unfortunately only record at 4X speed).  Tests with some Sony DVDs, 
recording at 16X have produced no errors.  So, I guess it's only my 
silver anniversary.  I'd stay far away from the Delkin discs.

Thanks,
Walt