I updated to 11.10, reusing my home partition so also my Thunderbird profile folder and now I see that the Messaging Menu and Unity integration extension 0.8 is not installed.
I'd like to keep my profile and do not start a new one, how do I install this missing extension? It appears as installed on new profiles, so it is on the system.
If anyone has the same problem - I found the extension in
/usr/lib/thunderbird-7.0/extensions
upon installing it message menu integration and Unity launcher badge work, but not the NotifyOSD upon receiving an email. Does anyone know how to remedy that?