Linux: update xdg-utils again, and check in the built versions of the scripts.

scripts/xdg-desktop-menu.in

 #!/bin/sh
 #---------------------------------------------
 #   xdg-desktop-menu
 #
 #   Utility script to install menu items on a Linux desktop.
 #   Refer to the usage() function below for usage.
 #
 #   Copyright 2009-2010, Fathi Boudra <fabo@freedesktop.org>
 #   Copyright 2009-2010, Rex Dieter <rdieter@fedoraproject.org>
 #   Copyright 2006, Kevin Krammer <kevin.krammer@gmx.at>
@@ skipping 70 matching lines @@
                 DEBUG 2 "Found default apps for $MIME: $default_app"
                 default_app="$default_app;"
                 break;
             fi
         done
         DEBUG 2 "Current default apps for $MIME: $default_app"
         if echo "$default_app" | grep "$2" > /dev/null 2> /dev/null; then
             # App already listed as default
             continue;
         fi
-        default_file="$1/defaults.list"
+        default_file="$(readlink -f "$1/defaults.list")"
         DEBUG 1 "Updating $default_file"
         grep -v "$MIME=" $default_file > ${default_file}.new 2> /dev/null
         if ! grep "[Default Applications]" ${default_file}.new > /dev/null; then
             echo "[Default Applications]" >> ${default_file}.new
         fi
         echo $MIME="$default_app$2" >> ${default_file}.new
         mv ${default_file}.new $default_file
     done
 }
 
@@ skipping 517 matching lines @@
 
             ;;
     esac
 done
 
 if [ x"$update" = x"yes" ] ; then
     update_desktop_database
 fi
 
 exit_success