diff -Nur xfce-mcs-plugins-4.4.0/plugins/keyboard_plugin/keys_management.c xfce-mcs-plugins-4.4.0.new/plugins/keyboard_plugin/keys_management.c
--- xfce-mcs-plugins-4.4.0/plugins/keyboard_plugin/keys_management.c	2007-01-20 16:45:31.000000000 +0100
+++ xfce-mcs-plugins-4.4.0.new/plugins/keyboard_plugin/keys_management.c	2007-02-24 19:02:16.000000000 +0100
@@ -44,6 +44,29 @@
 unsigned int SuperMask = 0;
 unsigned int HyperMask = 0;
 
+static gboolean
+get_keycode (Display *dpy, const char *str, KeyCode *keycode)
+{
+unsigned int value;
+KeySym keysym;
+ 
+keysym = XStringToKeysym (str);
+if (keysym == NoSymbol)
+{
+if (sscanf (str, "0x%X", (unsigned int *) &value) != 1)
+{
+*keycode = 0;
+return FALSE;
+}
+*keycode = (KeyCode) value;
+}
+else
+{
+*keycode = XKeysymToKeycode (dpy, keysym);
+}
+return TRUE;
+}
+
 MyKey *
 parseKeyString (char *str)
 {
@@ -67,7 +90,7 @@
 
         tmp = g_ascii_strdown ((gchar *) str, strlen (str));
 
-        my_key->keycode = XKeysymToKeycode (GDK_DISPLAY_XDISPLAY (gdisplay), XStringToKeysym (++k));
+        get_keycode (GDK_DISPLAY_XDISPLAY (gdisplay), ++k, &my_key->keycode);
         if (strstr (tmp, "shift"))
         {
             my_key->modifier = my_key->modifier | ShiftMask;
@@ -116,7 +139,7 @@
     }
     else
     {
-        my_key->keycode = XKeysymToKeycode (GDK_DISPLAY_XDISPLAY (gdisplay), XStringToKeysym (str));
+        get_keycode (GDK_DISPLAY_XDISPLAY (gdisplay), str, &my_key->keycode);
         my_key->modifier = 0;
     }
 
--- xfce-mcs-plugins-4.4.0.orig/plugins/keyboard_plugin/shortcuts_plugin.c
+++ xfce-mcs-plugins-4.4.0/plugins/keyboard_plugin/shortcuts_plugin.c
@@ -1003,6 +1003,12 @@
     g_free (accelerator);
     g_strfreev (shortcuts);
 
+    /* Use keycode if unknown keysym */
+    if (!strlen (shortcut_string))
+    {
+        g_snprintf (shortcut_string, sizeof (shortcut_string), "0x%X", (guint) event->hardware_keycode);
+    }
+
     /* check if shorcut already exists */
     selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (dialog->treeview_shortcuts));
     gtk_tree_selection_get_selected (selection, &model, &iter);