Thunderbird Beta Notes

Version 64.0beta, first offered to channel users on October 26, 2018

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.

These release notes apply to Thunderbird version 64 beta 4 released December 2nd, 2018.

What’s New

  • changed

    ADD-ON SUPPORT: Restartless add-ons continue to work if their authors have made the necessary minor adjustments. Non-restartless legacy add-ons using XUL overlays are only supported if add-on authors have adapted them, and Lightning/Calendar is the only one we know that has been adapted.

  • changed

    Changed UI when installing add-ons. Restart required for legacy extensions.

  • changed

    Calendar: UI improvements for event dialog

  • fixed

    Print preview not working in Thunderbird version 63 beta

  • fixed

    Various Theme fixes where incorrect colors, backgrounds, etc. were displayed. Folders with new messages not shown in bold on Mac.

  • fixed

    Add-on Options menu not working on Mac

  • fixed

    Shift+PageUp/PageDown in Write window

  • fixed

    Saving content of Write windows didn't overwrite existing file

  • fixed

    Issues related to "Edit Template" command

  • fixed

    Gloda attachment filtering

  • fixed

    S/MIME encryption/signing not working in Thunderbird version 63 beta

  • fixed

    Body search/filtering didn't reliably ignore content of tags

  • fixed

    Mails won't get removed from Trash folder using Maildir. Note: Other deletion issues related to Maildir still persist.

  • fixed

    If the "Date" header of a message was invalid, Jan 1970 or Dec 1969 was displayed. Now using date from "Received" header instead.

  • fixed

    Mailing list address auto-complete enter/return handling

  • fixed

    When sending of a message failed due a security issue, only "unknown error" was displayed. Now more details are given.

  • fixed

    "Select All" in mail view not working in Thunderbird version 63 beta

  • Beta 2

    Fixed in Thunderbird 64 beta 2

  • fixed

    According to RFC 4616 and RFC 5721, passwords containing non-ASCII characters are encoded using UTF-8 which can lead to problems with non-compliant providers, for example office365.com. The SMTP LOGIN and POP3 USER/PASS authentication methods are now using a Latin-1 encoding again to work around this issue.

  • fixed

    "Download rest of message" not working if global inbox was used

  • fixed

    Shutdown crash/hang after entering an empty IMAP password

  • Beta 3

    Fixed in Thunderbird 64 beta 3

  • fixed

    Cookie removal (not working since Thunderbird version 52)

  • fixed

    Encoding problems for users (especially in Poland) when a file was sent via a folder using "Sent to > Mail recipient" due to a problem in the Thunderbird MAPI interface

  • fixed

    Under some circumstances Thunderbird on Mac would send attachments using the so-called AppleDouble format which could lead to problems with mail servers and recipients

  • fixed

    Encoding problems when exporting address books or messages using the system charset. Messages are now always exported using the UTF-8 encoding.

  • Beta 4

    Fixed in Thunderbird 64 beta 4

  • fixed

    Inappropriate warning "Thunderbird prevented the site (addons.thunderbird.net) from asking you to install software on your computer" when installing add-ons

  • fixed

    Incorrect display of correspondents column since own email address was not always detected

  • fixed

    New email not inserted in correct sort order in threaded unified view or search folder

Known Issues

  • unresolved

    Spurious 
 (encoded newline) inserted into drafts and sent email (working in Thunderbird ESR, will be fixed in version 65 beta)

  • unresolved

    Double-clicking on a word in the Write window sometimes launches the Advanced Property Editor or Link Properties dialog (working in Thunderbird ESR, will be fixed in version 65 beta)

  • unresolved

    Spellcheck marks disappeared erroneously for words with an apostrophe (working in Thunderbird ESR)

  • unresolved

    Editing a plaint text draft may display the entire message as quote (in blue) (working in Thunderbird ESR, will be fixed in version 65 beta)

  • unresolved

    Chat: Twitter not working due to API changes at Twitter.com

  • unresolved

    Chat: Participants not sorted