Rated 5 out of 5 stars

It would be embarrassing to say how long I looked for something that would let me toggle and untoggle "View > Sort by > Threaded" with a single keystroke. Mac OS X Keyboard Shortcuts, AppleScripts, config, add-ons, nothing -- thank heavens I found this add-on, finally. It does exactly what I wanted it to do, and it's compatible with Thunderbird 3.1.

This review is for a previous version of the add-on (0.5).