Not necessarily old vs. new (although older units do tend to have problems). When I went shopping for my wife's car CD player, I brought along the crappiest "Hi-Val" burned CD I could find. I tried different units until I found one that would play it - Pioneer, as it turned out (even the most expensive Sony wouldn't play it).
My Toshiba DVD only plays the cheap 50/9.99 CompUSA CDR's. It won't play any other brand I've tried...Go figure.
BTW, I've been playing burned CD's in my car for over 3 years and never had any 'damage' caused by the media played. Sounds like tough luck to me.
(M)