Am running 11.10 with gnome-shell. Just switched default file manager to gnome commander. I previously used Marlin as default file manager and plugging in USB drives automounted them. Since uninstalling Marlin, and installing Gnome Commander, the drives no longer get auto mounted. Drives are visible as "devices" if I launch Nautilus manually. If I select them, they mount.
I've checked dconf-editor and the media-handling key is set to automount and automount-open. I'm attaching a screenshot as there maybe another key that's relevant here...
