Nautilus uses only one screen even if it is instructed to start on another screen.

Reproduction:

1. start with a desktop having two screens setup (i.e. multihead), e.g. :0.1 and :0.0
2. issue in a terminal :  DISPLAY=:0.0 nautilus --no-desktop & 
(or if you like: nautilus --no-desktop --display=:0.0 & )
3. issue : DISPLAY=:0.1 nautilus --no-desktop &


Expected:

One nautilus windows in screen :0.0 and one in :0.1

Result:

Two windows of nautilus appear on screen :0.0


Extra info:

One can try the reverse , i.e :0.1 first and :0.0 then. The result is the same but both windows now appear in :0.1 instead of :0.0 and :0.1 . 


The behaviour does not change irrespectively of having started the terminal in screen :0.0 or :0.1 .

Same behaviour if starting nautilus windows with alternate methods , e.g. windows manager commands, or menus . Subsequent, nautilus windows start only on the screen where the first windows has started.