diff -ru xemacs-21.5.25.20060327.orig/src/intl.c xemacs-21.5.25.20060327/src/intl.c
--- xemacs-21.5.25.20060327.orig/src/intl.c	2005-12-27 18:12:09.000000000 +0100
+++ xemacs-21.5.25.20060327/src/intl.c	2006-03-27 17:06:52.000000000 +0200
@@ -84,8 +84,10 @@
 #ifdef HAVE_X_WINDOWS
   if (!init_x_locale (locale))
     {
-      /* Locale not supported under X.  Put it back. */
-      setlocale (LC_ALL, loc);
+      /* Locale not supported under X.  Set locale to "C" and print a warning. */
+	    warn_when_safe (Qwarning, Qwarning,
+			    "locale not supported by Xlib, setting locale to C.");
+      setlocale (LC_ALL, "C");
       setlocale (LC_NUMERIC, "C");
       free (loc);
       return Qnil;