You can run into a bad batch of blanks at times too. I know that well even with the older familiar brands. Generally I see reliable burns with TDKs as far as cd-rs are concerned besides the occasional disk toss contest.
But when going to use a factory sealed container of their dvd-rs for burning a data dvd...what?! track data already on a blank disk?
GGrrrr... I found that on some odd generic labeled brand as well with the same type of crap tossing those out.