Mozilla Messaging has completed the merge of Thunderbird 11 to the Beta channel. What’s new in Thunderbird 11 Beta:
- 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.