diff -urN online_users-1.2.1.orig/functions.php online_users-1.2.1/functions.php
--- online_users-1.2.1.orig/functions.php	2003-11-17 16:20:08.000000000 +0200
+++ online_users-1.2.1/functions.php	2009-12-10 10:00:18.000000000 +0200
@@ -24,6 +24,13 @@
 }
 
 function show_ou() {
+  global $default_charset, $squirrelmail_language;
+  
+  if ($squirrelmail_language == 'ja_JP') {
+    $charset = 'euc-jp';
+  } else {
+    $charset = $default_charset;
+  }
 
   include_once (SM_PATH . 'plugins/online_users/config.php');
 
@@ -39,12 +46,12 @@
 
   include_once(SM_PATH . 'functions/i18n.php');
   bindtextdomain('online_users', SM_PATH . 'plugins/online_users/locale');
+  bind_textdomain_codeset('online_users',$charset);
   textdomain('online_users');
 
   echo '<div align="center"><br>' . _("Number of online users:");
   echo "&nbsp;<strong>$online_users</strong></div>";
 
-  bindtextdomain('squirrelmail', SM_PATH . 'locale');
   textdomain('squirrelmail');
 }
 
Binary files online_users-1.2.1.orig/locale/tr_TR/LC_MESSAGES/online_users.mo and online_users-1.2.1/locale/tr_TR/LC_MESSAGES/online_users.mo differ
diff -urN online_users-1.2.1.orig/locale/tr_TR/LC_MESSAGES/online_users.po online_users-1.2.1/locale/tr_TR/LC_MESSAGES/online_users.po
--- online_users-1.2.1.orig/locale/tr_TR/LC_MESSAGES/online_users.po	2003-11-17 16:20:08.000000000 +0200
+++ online_users-1.2.1/locale/tr_TR/LC_MESSAGES/online_users.po	2009-12-10 09:42:10.000000000 +0200
@@ -1,15 +1,14 @@
-# SOME DESCRIPTIVE TITLE.
-# Copyright (C) YEAR Free Software Foundation, Inc.
-# FIRST AUTHOR <EMAIL@ADDRESS>, YEAR.
+# Turkish translation of SquirrelMail online_users plugin
+# Copyright (C) 2002 Kerem Erkan <kerem.erkan@hacettepe.edu.tr>.
+# Kerem Erkan <kerem.erkan@hacettepe.edu.tr>, 2002.
 #
-#, fuzzy
 msgid ""
 msgstr ""
-"Project-Id-Version: PACKAGE VERSION\n"
+"Project-Id-Version: online_users 1.2.1\n"
 "POT-Creation-Date: 2002-09-26 15:37-0600\n"
-"PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
-"Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
-"Language-Team: LANGUAGE <LL@li.org>\n"
+"PO-Revision-Date: 2002-09-26 15:37-0600\n"
+"Last-Translator: Kerem Erkan <kerem.erkan@hacettepe.edu.tr>\n"
+"Language-Team: Turkish <squirrelmail-i18n@lists.sourceforge.net>\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=ISO-8859-9\n"
 "Content-Transfer-Encoding: 8bit\n"