Well, this is interesting, and may be an answer (although a sucky one) -- people over on CDFreaks have noticed a marked drop in quality on Verbatim DVD+R media, now using a serial number starting with "PAP6" instead of "PAPA".
Well, guess what-- my awesome burning original DVD-Rs have a serial starting with "MAPA" and the new ones start with "MAP6".
Seems like there's been a dye change...
(yes, I have pointed both threads to each other, but it seems like this is a Big Deal as suddenly Verbatim media isn't as safe a buy as it used to be)
It's not a bad burn, but it's not the kind of result I'm used to getting from Verbatim. I'll post up some PIF scans (I've done them, just haven't posted) when I remember to dig them up.