Stops working sometimes Rated 4 out of 5 stars

Just to point out that this extension has stopped working on me a couple of times and I have had to reinstall it. Also, I think this 1.4.6 version is wrongly signed (in the XDI, I suppose) as 1.4.2 or something, which might be why I couldn't get it to automatically update through Thunderbird Addons menu. Anyway, it work now, and gets rid of a really annoying error that has made be send an email late on more than one occasion...