This is just a minor annoyance, but I wondered if anyone has any insights. When I first boot the system and log in to Gnome, and then plug in e.g. a USB stick or compact flash card, I get an icon for it on the desktop. I can right-click on this icon to "eject" the filesystem, etc. Eventually, though, for no obvious reason, this stops working and I no longer get an icon when I insert a USB device. The automount is still happening; I can still navigate to the device under /media with Nautilus, and I can still umount it from a shell as a nonprivileged user. What process is supposed to be noticing the new mount and adding the icon? Any clues as to why it would stop doing so?