Hi all.
I have a Hebrew weblog using MT 3.11 and UTF-8 encoding.

The comment's email is encoded properly for the body (with Content-Type: text/plain; charset="UTF-8" ) but not in the sobject line, which makes Hebrew in the subject line junk.

The proper why to encode non-ascii characters (like Hebrew) is detailed here:
http://www.faqs.org/rfcs/rfc2047.html

IMO, when the blog is set to UTF-8, the email should be properly encoded that why as well, including the subject line.