[rt-users] Strange recoding and headers after upgrading from 3.0.6 to 3.0.10

[Pavel Titov]

I've upgraded RT from 3.0.6 to 3.0.10 version (more definetly - 
installed 3.0.10 on other server with same database that 3.0.6 used). 
And now some letters, that processed by 3.0.10 converts to something 
strange and unreadable. Headers follows, note the double 
X-RT-Original-Encoding header (actual domain names were removed by me):

MIME-Version: 1.0
In-Reply-To: <rt-3.0.10-481-4392.0.848516322792179@****>
X-Mailer: The Bat! (v2.11 Beta/5) UNREG / CD5BF9353B3B7091
X-Priority: 3 (Normal)
Date: Mon, 7 Jun 2004 17:30:54 +0400
Message-Id: <446377929.20040607173054@****>
References: <rt-481 at RT> <rt-3.0.10-481-4392.0.848516322792179@***>
Reply-To: mail <mail@****>
Content-Type: text/plain; charset="utf-8"
X-Virus-Scanned: by amavisd-new at bhost.ru
To: Pavel Titov <support@****>
Content-Transfer-Encoding: 8bit
X-RT-Original-Encoding: koi8-r
From: mail <mail@****>
X-RT-Original-Encoding: utf-8
Content-Length: 1231

What can cause this problem? What do double X-RT-Original-Encoding 
header mean?
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