Rated 3 out of 5 stars

A good concept, however, when typing keyword search, creating folders etc, the T and U keys are always enabled making it impossible to do searches, folder operations etc., on the Mac.

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

This bug will be solved in Thunderbird 3. For the time being you can do the following as a workaound:
- When searching you can type Shift+T and Shift+U if you search case insensitive;
- Copy/paste the name for creating a folder from another application or compose window;
- (Temporarily) disable this extension.