Thunderbird Release Notes

Version 45.1.0, first offered to channel users on May 10, 2016

Check out "What’s New" and "Known Issues" for this version of Thunderbird below. As always, you’re encouraged to tell us what you think, or file a bug in Bugzilla. If interested, please see the complete list of changes in this release.

What’s New

  • fixed

    Drag & Drop a contact name from Thunderbird address book (list view) to address box in a new message “compose” window failed.

  • fixed

    UI elements became larger when moused over on retina displays/monitor on Mac OS X

  • fixed

    Automatic correspondents column upgrade disabled

  • fixed

    DIGEST-MD5 authentication in JS-XMPP failed for some users (now disabled).

  • fixed

    Font indicator in compose falsely claimed certain fonts were not installed.

  • fixed

    Printing failed in composition window.

  • fixed

    Various security fixes

  • fixed

    Various improvements in handling of message compose in paragraph mode.

Known Issues

  • unresolved

    Email with signature and safe HTML elements is sent as HTML, despite "Delivery Format: Auto-detect" option