I have a fairly sizable divx collection on varying brands of CD-R, most of which I've watched before on my old drive (sorry, don't know the brand) and not had any problems with.
I got a few out to watch just now, and upon getting error after error in Media Player I ran Nero CD Speed's Scandisc Surface Scan to have a look. About 1/3 of the blocks on the disc were unreadable, which strikes me as quite odd for discs I've used more than once before.
Anyone know why this might be?