Comment 2 for bug 95519

Content of $HOME/.gnome2/nautilus-scripts/expose
#!/bin/tcsh
set report = $HOME/expose.txt
echo >> $report
date >> $report
echo "Arg1 is $1" >> $report
echo "Arg2 is $2" >> $report
echo "Arg3 is $3" >> $report
echo "NAUTILUS_SCRIPT_SELECTED_FILE_PATHS" >> $report
echo $NAUTILUS_SCRIPT_SELECTED_FILE_PATHS >> $report
echo "NAUTILUS_SCRIPT_SELECTED_URIS" >> $report
echo $NAUTILUS_SCRIPT_SELECTED_URIS >> $report
echo "NAUTILUS_SCRIPT_WINDOW_GEOMETRY" >> $report
echo "$NAUTILUS_SCRIPT_WINDOW_GEOMETRY" >> $report
echo "NAUTILUS_SCRIPT_CURRENT_URI" >> $report
echo "$NAUTILUS_SCRIPT_CURRENT_URI -- " >> $report

I have selected three files in my home directory
space\ space
space2\ \ space2
ScratchPad

This is the result of choosing scripts_expose with the right mouse button:

Sat May 3 19:56:56 MDT 2008
Arg1 is ScratchPad
Arg2 is space2 space2
Arg3 is space space
NAUTILUS_SCRIPT_SELECTED_FILE_PATHS
/home/doug/ScratchPad /home/doug/space2 space2 /home/doug/space space
NAUTILUS_SCRIPT_SELECTED_URIS
file:///home/doug/ScratchPad file:///home/doug/space2%20%20space2 file:///home/doug/space%20space
NAUTILUS_SCRIPT_WINDOW_GEOMETRY
847x753+767+72
NAUTILUS_SCRIPT_CURRENT_URI

Note that the arguments are correct.
Note that the selected URI's properly show the URL-encoded double space in the file name.
Note that the file paths have truncated the double space into a single space.

The only document I have is "Ubuntu Hacks", O'Reilly, June 2006 which clearly says the files and URIs are new-line delimited in Hack 24.
It appears that the current rule is to use a double space.