Comment 40 for bug 548546

I tried to reproduce this with

sudo losetup /dev/loop0 download/ubuntu/natty-desktop-amd64.iso

-> Volume/Drive created and appears in palimpsest and nautilus

sudo mount /dev/loop0 /mnt

-> Volume/Drive disappear in nautilus, as it's hidden from user sessions (not in /media); stays in palimpsest

sudo umount /mnt

-> Volume/Drive reappear in nautilus, as it's now umounted; still stays around in palimpsest

sudo losetup -d

-> volume/drive go away in nautilus/palimpsest

So it's something more specific to what usb-creator does. Need to investigate that in more detail then (debug cycles are quite long with a full usb-creator write turnaround).