Though setting utf-8 as the default charset for the mail editor,
Content-Type: text/plain; charset=
without specifying any charset. You have to manually set the charset
every time you write a mail.
Are you still able to reproduce this bug? Do you have to be running in a
particular locale for this to happen?
dunno... just scan our internal Emails.. several of them use evolution and I see
it on some of them.