Puntuado con 4 de 5 estrellas

The only missing item I see is the Grouped By Sort bars. View -> Sort By -> Grouped By Sort.

Esta valoración es de una versión anterior del complemento (1.6). 

Thank you for a report.

Because the appearance of original LeopardMail was lost when I included the function by all means, I took off a function.
Please expect it in new Thunderbird 3.
Thank you.