The Tor Browser Bundles have been updated to Firefox 9.0.1. Originally they were updated to Firefox 9 and both changelogs are listed below.
The Tor Browser Bundles have been updated to Tor 0.2.2.35 which has a fix for a security critical bug.
The Tor Browser Bundles have been updated to Firefox 8.0.1 along with a new Libevent and some extension updates.
The Tor Browser Bundles have been updated again, this time with Firefox 6.0.2, Torbutton 1.4.2, and more privacy-enhancing patches.
Torbutton 1.4.1 has been released at: https://www.torproject.org/torbutton/
We've updated the experimental Tor Browser Bundles to Firefox 6 and all users are strongly encouraged to upgrade, as Firefox 6 fixes some serious security issues present in Firefox
The stable Tor Browser Bundle for Windows and the beta Firefox 3.6 Tor Browser Bundles for Linux and OS X have been updated to Firefox 3.6.20.
Updated 06/16/2011: Break off window.name into its own linkability issue. While ultimately it should be handled identically to the referer, that was not clear in the original text.
Tor 0.2.2.25-alpha is out and there are the usual packaging updates.
In a random bar about two years ago, a Google Chrome developer asked me why Torbutton didn't just launch a new, clean Firefox profile/instance to deal with the tremendous number of state separation