Just Released

February 16th

• Thunderbird 10.0.2
• Thunderbird 10.0.2 ESR

Coming Soon

March 13th

• Thunderbird 3.1.19
• Thunderbird ESR 10.0.3
• Thunderbird 11 Final Release
• Thunderbird 12 Beta (12.0b1)*
• Thunderbird 13 Earlybird (13.0a2)*

Future Releases

April 24th

• Thunderbird 3.1.20 *LAST RELEASE ON 3.1.x BRANCH*
• Thunderbird ESR 10.0.4
• Thunderbird 12 Final
• Thunderbird 13 Beta (12.0b1)*
• Thunderbird 14 Earlybird (13.0a2)*

* As part of the new Rapid Release Schedule,dates listed for Earlybird and Beta builds reflect when the code merge is set to begin. The actual release to that particular channel may vary by several days. See the Wiki for more details.

Users can update via Help > About Thunderbird or manually update and install from getthunderbird.com

While on the subject of version numbers, Mozilla in an attempt to fix one issue has once again caused (or recreated) another issue. We are back to the version numbering getting all wonky when there is Chemspill or Firedrill releases. With Rapid Release we know that on March 13th, the next regular release will be Thunderbird 11, regardless if there are any more emergency releases between now and then. With Thunderbird ESR, version 10.0.1esr was suppose to on March 13th, but now with the emergency release last week the next version will be 10.0.2esr (as long as there are no other releases between now and then). This just adds to the confusion as to which version is current as we have seen with the soon to be retired Thunderbird 3.1.x branch.
UPDATED: This issue appears to be resolved now and users are moving over to Thunderbird 10.0.1 ESR via automated updates.

Just Released

February 9th

• Thunderbird 10.0.1
• Thunderbird 10.0.1 ESR

Coming Soon

March 13th

• Thunderbird 3.1.19
• Thunderbird ESR 10.0.2
• Thunderbird 11 Final Release
• Thunderbird 12 Beta (12.0b1)*
• Thunderbird 13 Earlybird (13.0a2)*

Future Releases

April 24th

• Thunderbird 3.1.20 *LAST RELEASE ON 3.1.x BRANCH*
• Thunderbird ESR 10.0.3
• Thunderbird 12 Final
• Thunderbird 13 Beta (12.0b1)*
• Thunderbird 14 Earlybird (13.0a2)*

* As part of the new Rapid Release Schedule,dates listed for Earlybird and Beta builds reflect when the code merge is set to begin. The actual release to that particular channel may vary by several days. See the Wiki for more details.

• Several fixes to improve stability.
• Fix a security issue, see the Security Advisory.

User can update via Help > About Thunderbird or manually download and update at getthunderbird.com site.

Just Released

January 31st

• Thunderbird 3.1.18
• Thunderbird 10.0
• Thunderbird 10.0.0 ESR

February 3rd

• Thunderbird 11 Beta (11.0b1)*
• Thunderbird 12 Earlybird (12.0a2)

Coming Soon

March 13th

• Thunderbird 3.1.19
• Thunderbird ESR 10.0.1
• Thunderbird 11 Final Release
• Thunderbird 12 Beta (12.0b1)*
• Thunderbird 13 Earlybird (13.0a2)*

Future Releases

April 24th

• Thunderbird 3.1.20 *LAST RELEASE ON 3.1.x BRANCH*
• Thunderbird  ESR 10.0.2
• Thunderbird 12 Final
• Thunderbird 13 Beta (12.0b1)*
• Thunderbird 14 Earlybird (13.0a2)*

* As part of the new Rapid Release Schedule,dates listed for Earlybird and Beta builds reflect when the code merge is set to begin. The actual release to that particular channel may vary by several days. See the Wiki for more details.

Lightning Users: You will need to manually update to Lightning 1.4b1 via the Calendar Versions site.

• Tabs are now shown above the toolbar
• New wizard to sign up for new accounts
• More trust options added to junk settings (Bogofilter, DSPAM, POPFile)
• and several other platform fixes

Existing Thunderbird Beta users should be able to update from within Thunderbird via Help > About Thunderbird. Otherwise users can download Thunderbird Beta 11 and manually update here.

Lightning Users: You will need to manually update Lightning to 1.3b1 which can be obtained from the Calendar Versions site.

Thunderbird 11 is scheduled for release on March 13, 2012.

“Firefox users love Personas. They’re a fun and easy way to customize Firefox and make it your own. But in talking with new users, we’ve learned that they are often confused by the name and don’t quite get that Personas are just another
way to theme your browser. And more often than not, when a Firefox user
describes the look of their browser, they use words like “wallpapers” or
“backgrounds” instead of the proper name Personas.

We’ve come up with several options for a new name and want to know what you think. Please take a look at the poll below and submit your vote by Wednesday, February 8. Your choice will play a big role in which name we choose, as well as
other factors including the word’s meaning in other cultures and
languages.”

VOTE NOW

Bug 563318 (switch Firefox trunk builds to use Visual C++ 2010) has had landed on the Firefox 13 Nightly builds (has been temporarily backed out to address some crash issues). This also means the Comm-Central (Thunderbird Daily) channel would have had the same update. So those who are wanting to use the Thunderbird 13 Daily builds will need to be running Windows XP with SP2. Windows 2000 users will need to find a new email client. Thunderbird 13 will be released on June 5th, 2012 which means that Thunderbird 12 scheduled for release on April 24th, 2012 will be the last Thunderbird version to support the older versions of Windows (2000 and XP SP1). Important: Because Thunderbird 10.0.0 ESR (released January 31st) is based off of Thunderbird 10, it will continue to support the older versions of Windows until the next release of ESR 17 (based off of Thunderbird 17) on November 20th, 2012 (though support of ESR 10.0.x will continue through February 2013)

More Info