[1.4.20RC2] case exact match in decodeheader

Hi,

my acquaintance find there is a case exact match in processing
decoding encoded header.

This problem still exists in 1.4.20RC2 and affects replying/forwarding
a mail.

Attached patch fix the problem.  Case of "q|b" part has changed to the
same as other regular expressions.

Best regards.

-- 
Takahiro Kambe <[email protected]>


--- functions/i18n.php.orig	2009-07-29 11:21:06.000000000 +0900
+++ functions/i18n.php	2009-10-04 10:17:48.000000000 +0900
@@ -675,7 +675,7 @@
             break;
         case 'decodeheader':
             $ret = str_replace("\t", "", $ret);
-            if (preg_match('/=\?([^?]+)\?(q|b)\?([^?]+)\?=/', $ret))
+            if (preg_match('/=\?([^?]+)\?(Q|B)\?([^?]+)\?=/Ui', $ret))
                 $ret = @mb_decode_mimeheader($ret);
             $ret = @mb_convert_encoding($ret, 'EUC-JP', 'AUTO');
             break;


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