I use nero on pretty much every non iso burn on windows. On linux mostly k3b. Are you using name brand media like Memorex, TDK, Verbatim, Sony?
Same here, as well as a handful of the other popular burning apps. The only coasters I've ever had in my life were from a small batch of generic CDRWs from over 10 years ago. Since then I stuck to Name Brand and every disc I've tried has been golden. Not sure what's going on when I see a lot of people always toasting discs. Though I probably don't burn stuff nearly as much as many people do, since I've always mainly used external hard drives for BU. One thing though is I always burn at a rate no more than 50-75% of the discs rated speed. That might have something to do with it.