Hi! I haven't tried another bd-r with growisofs, two coasters are enough for me. The wrongly written media is mounted without errors, but when I try to play an avi file from it, the avi doesn't have the index in the end of the file. I've tried nero linux, and it burns fine to bd-r media. Hope somebody fixes this, i'd like to use growisofs (k3b) instead of nero. Thanks for the reply. Feri