From the article from mozillazine.org:
mozilla.org today released upgrades to both Firefox 0.9 (0.9.1) and
Thunderbird 0.7 (0.7.1) to fix some minor bugs present in both
releases. Both releases correct some flaws in the extension system
that some users may have been experiencing, as well as a new icon set
for the navigation toolbar on Windows and Linux in Firefox 0.9.1. All
users of both products should get this upgrade.
Here are the highlights for this release of Thunderbird:
* Smaller and Faster
The Windows Installer is now only a 5.9MB download. Significant
performance improvements on Windows, Linux and Mac OS X!
* New Themes and Extension Manager
Provides a convenient and secure way to manage and update the many
add-ons that set Thunderbird apart from other e-mail clients.
* Crash Analysis Tools (Talkback)
Help us help you! Integration with Mozilla Talkback allows users to
submit crash reports which makes it easier for us to find Thunderbird
top crashes.
* Other New Features...
New user interface for viewing vCards.
New Profile Manager which also supports running from a USB device.
Color quoting for quoted message parts.
Thunderbird now supports a user interface for creating multiple
identities per e-mail account. This makes it easy to have several
e-mail addresses which end up going into the same account.
* Recently Fixed Bugs
Fix for an occassional hang when reading IMAP mail over SSL.
Our LDAP support works against older version 2 LDAP servers again in
addition to version 3.
Thunderbird can handle mailto urls that contain raw spaces in the
subject.
Other bug fixes too numerous to mention!
What's new from release notes:
* Improved Junk Mail Controls
The algorithm for the adaptive junk mail controls has been heavily
redesigned to learn faster and catch more spam.
* New Brand Identity
To be consistent with the Mozilla Foundation's goal of brand identity,
Thunderbird has a new logo and supporting artwork thanks to the fine
work of the Mozilla Visual Identity team.
* Other New Features...
- IMAP users can now benefit from support for the IMAP IDLE command
which allows the mail server to push notifications such as new mail
arriving as soon as it arrives.
- Thunderbird supports server-wide news filters that apply to all
newsgroups on a server.
- Thunderbird includes Secure Password Authentication using a new
cross-platform NTLM authentication mechanism for IMAP, POP3 and SMTP.
- Mail filters can now mark messages as junk.
- Tools > Options > Compose > HTML Options allows you to set up
default HTML compose options such as font, size and color.
- Attachments can be opened directly from the compose window to verify
their contents before sending.
- Thunderbird now supports the notion of multiple identities per mail
account. This makes it easy to have several e-mail addresses which end
up going into the same account. Read More about how to set this up.
* Recently Fixed Bugs
- In the case of a failure when copying a message to an online Sent
folder, Thunderbird will now ask if you would like it to try again.
- Pasting data from an OpenOffice.org spreadsheet no longer pastes
random HTML garbage before the actual spreadsheet data into HTML
compose.
- Fixed several situations where LDAP connections were left open when
using LDAP auto complete or performing searches on LDAP directories.
- Improved view source behavior.
- Mail notification for POP3 messages that are marked deleted or
marked read by mail filters no longer occurs.
- The "Mark All Read" keyboard shortcut now works for Linux GTK2.
Mozilla Thunderbird is a redesign of the Mozilla mail component. The
goal is to produce a cross platform stand alone mail application using
the XUL user interface language.
