A member in my Thunderbird Help forum has posted this puzzling issue while running a portable U3 version of Thunderbird 2.0.0.18: When I go to delete an email – maybe I’ve read that mail or maybe it’s spam, should make no difference; however, sometimes the mail won’t delete (but then copies to the trash folder) and sometimes two messages will delete when I only had one selected and intended for deletion. In neither case am I happy with such results. I don’t need multiple copies of mail I want to delete and I certainly don’t want to delete unread, non-spam…

Mozilla Messaging has released Thunderbird 2.0.0.21 on March 18th. Users will be prompted for an automatic update within the next 72 hours.Those wishing to upgrade now can do so via the Help Menu, Check For Updates option or by downloading the latest release at getthunderbird.com. Thunderbird 2.0.0.19 contains many security fixes and the full details can be found in the Thunderbird 2.0.0.21 Release Notes.

The name of this add-on says it all. Once installed simply double-click on the tab to reload. Reload Tab On Double-Click is about 2 KB and works with Firefox 1.0-3.0.X (but can be forced to work with Firefox 3.1/3.5 via Nightly Tester Tools) Source: Mozilla Links