Bug#608671: Cannot unmount USB volumes

[dAgeCKo]

I don't know for the author but I have a similar problem.
Mounting USB volumes threw gnome 3 works well, but unmounting them (ie 
threw nautilus) does not work at all.

The error window says that the volume is busy (even if no program use 
it: nautilus directory is located somewhere else).
Clicking on cancel close the window for one second but raise it again.

I am obliged to unplug the volume, which can lead to data corruption. So 
I now propose to raise the priority to grave.

Current gvfs version: 1.16.3-2

Also, please note that sometimes, trying to force the unmount of the 
volume (threw the gnome gvfs error window) could lead gnome to display 
an error window which cannot be closed. We are then obliged to hardly 
restart gnome, which can lead to other data corruption (all opened 
programs are hardly killed).
In some other tests, even the ctrl-alt-F1 combination might not work, 
then we must reset the computer...

So, the priority might even be critical.