Some players may have more difficulty with CD-Rs, depending on the exact kind of CD-R, the speed at which it was recorded, and more.

As a music programmer, I find it disconcerting for something to play perfectly at home and then, on the air in mid-set, to halt or start producing a lot of aberrations. This seems to be a lot more likely to happen with CD-Rs.

Sometimes I can rip an iffy CD at home, rerecord it at 12X speed, and have better luck than with the original.

Aren't CD-Rs supposed to be more sensitive to exposure to sunlight than burned CDs?