Its good, but Rated 3 out of 5 stars

Plugin is not be able to sign messages. Encryption works, but at the time of signing a window pops up to enter a password. After entering the (correct) password, and click on "OK" window pops up again. And so all the time. Unable to sign messages. Certificate from COMODO. Mail programs, such as OE or Thunderbird these certificates work.
Does anyone have similar symptoms? How can I fix this? Or perhaps am I doing something wrong.
Translated by google ;)

This review is for a previous version of the add-on (0.4.0).