No name in AOM Puntuado con 5 de 5 estrellas

Name unavailable with latest 1.20: AOM shows only version number.

Esta valoración es de una versión anterior del complemento (1.20.1-signed). 

I just tested the version from here on Firefox 4, 5 and 8. It is working here. Maybe you could try reinstalling it, or if you have custom css changing the add-ons manager that could be causing the problem (if you don't know what I'm talking about, you probably don't have any.) If that doesn't fix it, please post on the website/support page and we can troubleshoot more.