Purging libedataserver-1.2-15 seems to have done the trick - after doing so, thunderbird is functional and I see just one instance of libedataserver in /proc/*/maps
I still have 2 versions of libedataseerver on disk: ii libedataserver-1.2-16 3.4.3-1 amd64 Utility library for evolution data servers ii libedataserver-1.2-17 3.5.90-0ubuntu1 amd64 Utility library for evolution data servers -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to evolution-data-server in Ubuntu. https://bugs.launchpad.net/bugs/1040839 Title: Thunderbird hangs accessing eds on startup To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/evolution-data-server/+bug/1040839/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs