commit 74cdbc6d71120f2d9c91965ead989f68cadb4bac
Author: Ray Strode <rstrode@redhat.com>
Date:   Wed Jun 3 23:52:06 2009 -0400

    Fix language name parsing regex
    
    It didn't properly escape the "." character so it was allowing
    any character to be matched instead of just periods.

diff --git a/gui/simple-greeter/gdm-languages.c b/gui/simple-greeter/gdm-languages.c
index 2d862b2..429ba28 100644
--- a/gui/simple-greeter/gdm-languages.c
+++ b/gui/simple-greeter/gdm-languages.c
@@ -123,7 +123,7 @@ gdm_parse_language_name (const char *name,
         error = NULL;
         re = g_regex_new ("^(?P<language>[^_.@[:space:]]+)"
                           "(_(?P<territory>[[:upper:]]+))?"
-                          "(.(?P<codeset>[-_0-9a-zA-Z]+))?"
+                          "(\\.(?P<codeset>[-_0-9a-zA-Z]+))?"
                           "(@(?P<modifier>[[:ascii:]]+))?$",
                           0, 0, &error);
         if (re == NULL) {