[Evolution] Charset for mail messages: ANSI_X3.4-1968?

[Richard Zach <zach math berkeley edu>]

Why is evolution sending plain US-ASCII messages as "ANSI_X3.4-1968"?

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Subject: Test Email
From: Richard Zach <zach math berkeley edu>
To: zach math berkeley edu
Content-Transfer-Encoding: 7bit
X-Mailer: Evolution/0.10.99 (Preview Release)
Date: 08 Jun 2001 10:30:48 -0700
Message-Id: <992021450 980 4 camel mx80 dhs org>
Mime-Version: 1.0
Content-Type: text/plain; charset=ANSI_X3.4-1968
Content-Length: 26

This is plain US-ASCII.
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