Mozilla/Mozilla Labs has released the 3rd Beta for the upcoming (August 16th) Thunderbird 6.0. Users already on the Beta Channel can go to Help > About Thunderbird to move up the Beta 3, otherwise can get Beta 3 here.
New for Thunderbird 6 Beta include:
- Support for Windows 7 Jump lists
- Several fixes when importing email from Microsoft Outlook
- Default mail client check now works with newer Linux distributions
- Various other user interface fixes and improvements
- and numerous other bug fixes