Gnome-mount segfaults if I try to mount a floppy disk from Nautilus and there's no media. Upstream has a patch that fixes the problem, here's the link http://people.freedesktop.org/~david/gnome-mount-fix-segv-on-no-media.patch
Created attachment 87127 [details, diff] gnome-mount fix segv on no media
Patch applied to 0.4-r3