I am using Debian testing with KDE 4.6.5. However, when I insert my ubs stick, on top of the expected kde response I get a Nautilus window popping up (which is the Gnome file manager). How can I disable this?
Gvfs is Gnome virtual filesystem manager, but it should not be started under a KDE session unless you are/were running a Gnome service/program that requires its use. Check the daemons that are started within your current KDE session or just close any instance of gvfs, save your current KDE session and choose that KDE starts a manually saved session to prevent the service being started on each login.