Thundebird: current status

During bugfixing and improvement of EmojiPrint, found current Thunderbird, namely Thunderbird 3.1 still had many bugs, not a few, especially in MIME (multipurpose internet mail extensions) processing. For these years, used Evolution and so couldn't have caught up the latest of Thunderbird.
Some of bugs I noticed have been lost from my mind but will encounter them soon when should keep in mind...

MIME is not so easy.