New update ? Do you mean build 4.5.498 by that ? It's working great here, without any problem... actually, they solved all those glitches we reported to them... that's our Alwil team, and that's why we love them.
Anyway, where came that read error from ? Reading what ?
One thing always helps...
Uninstall avast! completely and reinstall it from the scratch. It will solve those problems...
Yes that was the build number. I think I've fixed the problem - hopefully permanently. it wasn't that the update was faulty, but it, or the process of updating, lost the existing settings. I tried several things, and in the end the one that restored the stamping was to un-tick absolutely everything in the setting and close the screen down - which presumably saves the settings again? Anyway, that's what fixed it, and the "clean" messages are adding again.
In fixing that, I have found another bug though, and it may be that it was the explanation for the fact that I couldn't get the messages to "stamp" in the earlier versions. If I sign a message with my X.509 certificate it prevents the "stamping" taking place. As I used to have the signature permanently on - that may explain why Avast! never added the messages. I've have repeated the proceedure several times - and it happens every time I sign the messages. Since many users will use X.509 certs, that definitely needs fixing.