I have some similar problem. I believe it is k3b trying to play safe although I have selected in options to force some unsafe operations. Try this command to verify this:
growisofs -speed=6 -M /dev/dvdrw -R -J -V myVolumeName /path/with/files/to/add/to/dvd -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/581265 Title: k3b cannot continue multisession DVD-Rs -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
