Mozilla Thunderbird 38.1.0 リリース

Fixed Copy/Paste into plain text editor deletes newlines from quoted text (bug 1143570)
Fixed Cross-posts won't send because Newsgroups: groups are separated with comma+space, not just comma (bug 1151448)
Fixed Cannot send email through exchange server (NTLM) (bug 1174159)
Fixed Doesn't display GB2312 encoded texts correctly for Chinese Characters (bug 1174580)
Fixed OAuth2 authentication for GMail does not work when specified server is imap.gmail.com or smtp.gmail.com. (bug 1176773)

http://www.mozilla.jp/thunderbird/38.1.0/releasenotes/

Thunderbird 38.1.0がリリースされていました。
いくつかの不具合が修正されたようです。