ok, from IRC discussion, the same happens when doing a direct dbus call:
"dbus-send --print-reply --dest="org.gnome.Nautilus" /org/gnome/Nautilus
org.gnome.Nautilus.FileOperations.EmptyTrash"
so it's not a unity issue in any case
the problem also is that a nautilus view is opened when it shouldn
attaching image
** Attachment added: "Screenshot from 2013-03-22 14:42:16.png"
https://bugs.launchpad.net/ubuntu/+source/nautilus/+bug/1131321/+attachment/3590383/+files/Screenshot%20from%202013-03-22%2014%3A42%3A16.png
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Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: nautilus (Ubuntu)
Status: New => Confirmed
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