Rated 5 out of 5 stars

This extension just works right out of the box! (although you can configure it a bit if you like).. but basically it removes a really irksome bug that has been lingering around Thunderbird for literally years. Someone should tell these guys that: https://bugzilla.mozilla.org/show_bug.cgi?id=273884

This review is for a previous version of the add-on (0.4a).