Note that this is not specific to the applet itself. Also when unmounting from the desktop (right click -> Unmount) or when entering 'umount /media/usbdisk' from a Terminal the same error occurs.
-- disk-mount applet fails to umount a luks encrypted usbstick https://launchpad.net/bugs/33859 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
