diff -urN program.orig/include/rcube_vcard.php program/include/rcube_vcard.php
--- program.orig/include/rcube_vcard.php	2011-09-05 11:49:04.000000000 +0300
+++ program/include/rcube_vcard.php	2011-12-29 19:39:57.000000000 +0200
@@ -755,6 +755,7 @@
     if ($string[0] != "\0" && $string[1] == "\0" && $string[2] != "\0" && $string[3] == "\0") return 'UTF-16LE';
 
     // use mb_detect_encoding()
+/*
     $encodings = array('UTF-8', 'ISO-8859-1', 'ISO-8859-2', 'ISO-8859-3',
       'ISO-8859-4', 'ISO-8859-5', 'ISO-8859-6', 'ISO-8859-7', 'ISO-8859-8', 'ISO-8859-9',
       'ISO-8859-10', 'ISO-8859-13', 'ISO-8859-14', 'ISO-8859-15', 'ISO-8859-16',
@@ -762,6 +763,16 @@
 
     if (function_exists('mb_detect_encoding') && ($enc = mb_detect_encoding($string, $encodings)))
       return $enc;
+*/
+    $encodings = array('UTF-8', 'WINDOWS-1251', 'ISO-8859-1', 'ISO-8859-2', 'ISO-8859-3',
+      'ISO-8859-4', 'ISO-8859-5', 'ISO-8859-6', 'ISO-8859-7', 'ISO-8859-8', 'ISO-8859-9',
+      'ISO-8859-10', 'ISO-8859-13', 'ISO-8859-14', 'ISO-8859-15', 'ISO-8859-16',
+      'WINDOWS-1252', 'BIG5', 'GB2312');
+
+    if (function_exists('mb_detect_encoding') && ($enc = mb_detect_encoding($string, $encodings))) {
+      if (($enc == 'ISO-8859-1') and (preg_match('/[\x80-\xFF]/', $string))) $enc = 'WINDOWS-1251';
+      return $enc;
+    }
 
     // No match, check for UTF-8
     // from http://w3.org/International/questions/qa-forms-utf-8.html