@Wolfgang: the bug description seems to fit. In fact I am not starting a kde4 session but a kde3 one. But which .desktop file lacks these DesktopNames entry. I'd guess the ones with the DE description, located in /usr/share/xsessions ? Yes. In the case of KDE3 it's /usr/share/xsessions/kde.desktop, you should add the
https://bugzilla.novell.com/show_bug.cgi?id=876130
https://bugzilla.novell.com/show_bug.cgi?id=876130#c5
--- Comment #5 from Wolfgang Bauer