the latest today's ubuntu3 version seems to work ok.
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to thunderbird in Ubuntu.
Thunderbird 45.3 failed to be built for Yakkety
Status in thunderbird package in Ubuntu:
Thunderbird is stuck at version 45.2 on Yakkety's proposed repository.
Packages for all archs failed to build. It should be v. 45.3 as Xenial's
packages. Additionally, there is a security notice :
To manage notifications about this bug go to:
Mailing list: https://launchpad.net/~desktop-packages
Post to : firstname.lastname@example.org
Unsubscribe : https://launchpad.net/~desktop-packages
More help : https://help.launchpad.net/ListHelp