Update xdg-utils to the latest version available in git.

third_party/xdg-utils/scripts/xdg-mime.in

 #!/bin/sh
 #---------------------------------------------
 #   xdg-mime
 #
 #   Utility script to manipulate MIME related information
 #   on XDG compliant systems.
 #
 #   Refer to the usage() function below for usage.
 #
 #   Copyright 2009-2010, Fathi Boudra <fabo@freedesktop.org>
@@ skipping 55 matching lines @@
 
     if [ $? -eq 0 ]; then
         exit_success
     else
         exit_failure_operation_failed
     fi
 }
 
 info_gnome()
 {
-    file=`readlink -f "$1"` # Normalize path
-
     if gvfs-info --help 2>/dev/null 1>&2; then
-        DEBUG 1 "Running gvfs-info \"$file\""
-        gvfs-info "$file" 2> /dev/null | grep standard::content-type | cut -d' ' -f4
+        DEBUG 1 "Running gvfs-info \"$1\""
+        gvfs-info "$1" 2> /dev/null | grep standard::content-type | cut -d' ' -f4
+    elif gnomevfs-info --help 2>/dev/null 1>&2; then
+       DEBUG 1 "Running gnomevfs-info \"$1\""
+       gnomevfs-info --slow-mime "$1" 2> /dev/null | grep "^MIME" | cut -d ":" -f 2 | sed s/"^ "//
     else
-       DEBUG 1 "Running gnomevfs-info \"$file\""
-       gnomevfs-info --slow-mime "$file" 2> /dev/null | grep "^MIME" | cut -d ":" -f 2 | sed s/"^ "//
+       # according to https://bugs.freedesktop.org/show_bug.cgi?id=33094#c5
+       # neither gvfs-info or gnomevfs-info are present in a default Ubuntu Natty
+       # install, so fallback to info_generic
+       info_generic "$1"
     fi
 
     if [ $? -eq 0 ]; then
         exit_success
     else
         exit_failure_operation_failed
     fi
 }
 
 info_generic()
 {
-    DEBUG 1 "Running file -i \"$1\""
-    /usr/bin/file -i "$1" 2> /dev/null | cut -d ":" -f 2 | sed s/"^ "//
+    if mimetype --version >/dev/null 2>&1; then
+        DEBUG 1 "Running mimetype -b \"$1\""
+        mimetype -b "$1"
+    else
+        DEBUG 1 "Running file -i \"$1\""
+        /usr/bin/file -i "$1" 2> /dev/null | cut -d ":" -f 2 | sed s/"^ "//
+    fi
 
     if [ $? -eq 0 ]; then
         exit_success
     else
         exit_failure_operation_failed
     fi
 }
 
 make_default_kde()
 {
@@ skipping 215 matching lines @@
         filename="$2"
         if [ -z "$filename" ] ; then
             exit_failure_syntax "FILE argument missing"
         fi
         case $filename in
           -*)
             exit_failure_syntax "unexpected option '$filename'"
             ;;
         esac
         check_input_file "$filename"
+        filename=`readlink -f -- "$filename"`
         ;;
 
       default)
         action=defapp
         mimetype="$2"
         if [ -z "$mimetype" ] ; then
             exit_failure_syntax "mimetype argument missing"
         fi
         case $mimetype in
           -*)
@@ skipping 73 matching lines @@
         if [ -x /usr/bin/file ]; then
             DE=generic
         fi
     fi
 
     case "$DE" in
         kde)
         info_kde "$filename"
         ;;
 
-        gnome)
+        gnome*)
         info_gnome "$filename"
         ;;
 
         *)
         info_generic "$filename"
         ;;
     esac
     exit_failure_operation_impossible "no method available for quering MIME type of '$filename'"
 fi
 
@@ skipping 348 matching lines @@
                 rm -f $kde_dir/$x.desktop
             fi
         done
         ;;
 esac
 
 update_mime_database $xdg_base_dir
 
 exit_success