Mozilla has, in addition to the Firefox update I discussed in the last post, released a new version, 3.1.6, of its Thunderbird E-mail client, for Linux, Windows, and Mac OS X. This update addresses the same vulnerability as the Firefox update; the risk for Thunderbird is lower, since the flaw can’t be exploited through normal E-mail usage. More details of the update are in the Release Notes. You can get the new version using the built-in update mechanism (Menu: Help / Check for Updates), or you can download an installation package here.
Although the risk from the patched vulnerability is not as great for Thunderbird as it is for Firefox, I do recommend installing this update as soon as you conveniently can.