When Firefox gets an update, usually it will be followed by Thunderbird or vice versa. It's because they shared lots of components together. So following Firefox's update, here comes thunderbird update this weekend:
Fri Sep 26 22:38:32 CDT 2008
Upgraded to thunderbird-220.127.116.11.
This upgrade fixes some more security bugs.
For more information, see:
(* Security fix *)