Some of our clients are using TheBat as their primary e-mail client. However it seems like even the latest version is unable to display UTF-8 encoded strings in the TO, FROM and SUBJECT fields. What seems to appears is the ANSI interpreted unicode bytes.
For example, this string in the To field:

=?utf8?b?0JzQsNGA0LjQvQ==?= <mstavrev@gmail.com>

that should be displayed as:

Марин <mstavrev@gmail.com>

,but appears as:

Марин <mstavrev@gmail.com>

The same problem exists for the From and Subject fields.

M. Stavrev

P.S. For some reason the cyrilic letter 'i' (smalcaps 'И' does not show correctly in the posts). Really strange.