I wrote a Thunderbird plugin a few months back that people may find useful to hide this issue in received mail at least. It changes wingding J, L and a few othe

I wrote a Thunderbird plugin a few months back that people may find useful to hide this issue in received mail at least. It changes wingding J, L and a few others to the unicode smiley, etc. http://github.com/richq/smileyfixer http://github.com/richq/smileyfixer It doesn't fix outgoing mails, so when you plain text reply to the original author they'll get their "J" right back at them :-)