[Evolution] Character encoding specified in Content-Type field of outgoing messages

[Alex Viskovatoff <member viskov fastmail fm>]

I have not seen this problem discussed on the list. I am using Evolution
1.2.4.

When composing a message, specifying a character encoding other than
"Western European (ISO-8859-1)" seems to have no effect on the MIME
field "Content Type" that is included in the message that is sent. No
matter what character encoding one specifies (I have tried ISO-8859-15
(my default) and KOI8-R), the "Content Type" field remains

  text/plain; charset=ISO-8859-1

I am surprised no one has brought up this problem before. That would
suggest that not many people use Evolution for languages other than
English.

Alex