k3b dual layer burning only as root?!?!?

Hi, SuSE 9.1 with KDE 3.4.1 (the problem persisted with 3.4 as well), and k3b 0.11.20cvs. I can burn single layer dvd and cd as regualr user OK, but it fails with some permission problem when I try to burn dual layer dvd. A complete bug report, with all the data is filed here: https://bugs.kde.org/show_bug.cgi?id=106472 Unfortunately, the k3b developer does not see this as bug, and thinks that it can be something kernel or system specific. Does anyone encountered this behaviour? Solutions? Thanks Sunny