[hkdave]

the only dvd9s that i have had problems with have been Memorex. they completely freeze not only my burner but the entire pc as well. very strange.

i usually use verbatim dls, although i have also had success with ridata too. i have found that burning speed also makes quite a difference in the number of bad burns i get, for me it's the slower the speed, the better.

also had some troubles w/ the layer break in nero, as mentioned above imgburn is excellent for that.