Puntuado con 5 de 5 estrellas

It is easy to correct: unzip the file .xpi (maybe modify the extension from xpi to zip) , open the file install.rdf and change the line
3.1a1pre
to
3.1.2
zip the archive, change the extensio from zip to xpi and install it.

Esta valoración es de una versión anterior del complemento (1.2). 

Puntuado con 5 de 5 estrellas

Very good extension.
But it does not work with thunderbird 3.1.
It is easy to correct: unzip the file .xpi (maybe modify the extension from xpi to zip) , open the file install.rdf and change the line
3.1a1pre
to
3.1
zip the archive and install it.

Esta valoración es de una versión anterior del complemento (1.2).